1 /*
2 * QEMU monitor
3 *
4 * Copyright (c) 2003-2004 Fabrice Bellard
5 *
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:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
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
22 * THE SOFTWARE.
23 */
24
25 #ifndef MONITOR_INTERNAL_H
26 #define MONITOR_INTERNAL_H
27
28 #include "chardev/char-fe.h"
29 #include "monitor/monitor.h"
30 #include "qapi/qapi-types-control.h"
31 #include "qapi/qmp-registry.h"
32 #include "qobject/json-parser.h"
33 #include "qemu/readline.h"
34 #include "system/iothread.h"
35
36 /*
37 * Supported types:
38 *
39 * 'F' filename
40 * 'B' block device name
41 * 's' string (accept optional quote)
42 * 'S' it just appends the rest of the string (accept optional quote)
43 * 'O' option string of the form NAME=VALUE,...
44 * parsed according to QemuOptsList given by its name
45 * Example: 'device:O' uses qemu_device_opts.
46 * Restriction: only lists with empty desc are supported
47 * TODO lift the restriction
48 * 'i' 32 bit integer
49 * 'l' target long (32 or 64 bit)
50 * 'M' Non-negative target long (32 or 64 bit), in user mode the
51 * value is multiplied by 2^20 (think Mebibyte)
52 * 'o' octets (aka bytes)
53 * user mode accepts an optional E, e, P, p, T, t, G, g, M, m,
54 * K, k suffix, which multiplies the value by 2^60 for suffixes E
55 * and e, 2^50 for suffixes P and p, 2^40 for suffixes T and t,
56 * 2^30 for suffixes G and g, 2^20 for M and m, 2^10 for K and k
57 * 'T' double
58 * user mode accepts an optional ms, us, ns suffix,
59 * which divides the value by 1e3, 1e6, 1e9, respectively
60 * '/' optional gdb-like print format (like "/10x")
61 *
62 * '?' optional type (for all types, except '/')
63 * '.' other form of optional type (for 'i' and 'l')
64 * 'b' boolean
65 * user mode accepts "on" or "off"
66 * '-' optional parameter (eg. '-f'); if followed by a 's', it
67 * specifies an optional string param (e.g. '-fs' allows '-f foo')
68 *
69 */
70
71 typedef struct HMPCommand {
72 const char *name;
73 const char *args_type;
74 const char *params;
75 const char *help;
76 const char *flags; /* p=preconfig */
77 void (*cmd)(Monitor *mon, const QDict *qdict);
78 /*
79 * If implementing a command that takes no arguments and simply
80 * prints formatted data, then leave @cmd NULL, and then set
81 * @cmd_info_hrt to the corresponding QMP handler that returns
82 * the formatted text.
83 */
84 HumanReadableText *(*cmd_info_hrt)(Error **errp);
85 bool coroutine;
86 /*
87 * @sub_table is a list of 2nd level of commands. If it does not exist,
88 * cmd should be used. If it exists, sub_table[?].cmd should be
89 * used, and cmd of 1st level plays the role of help function.
90 */
91 struct HMPCommand *sub_table;
92 void (*command_completion)(ReadLineState *rs, int nb_args, const char *str);
93 } HMPCommand;
94
95 struct Monitor {
96 CharBackend chr;
97 int suspend_cnt; /* Needs to be accessed atomically */
98 bool is_qmp;
99 bool skip_flush;
100 bool use_io_thread;
101
102 char *mon_cpu_path;
103 QTAILQ_ENTRY(Monitor) entry;
104
105 /*
106 * The per-monitor lock. We can't access guest memory when holding
107 * the lock.
108 */
109 QemuMutex mon_lock;
110
111 /*
112 * Members that are protected by the per-monitor lock
113 */
114 QLIST_HEAD(, mon_fd_t) fds;
115 GString *outbuf;
116 guint out_watch;
117 int mux_out;
118 int reset_seen;
119 };
120
121 struct MonitorHMP {
122 Monitor common;
123 bool use_readline;
124 /*
125 * State used only in the thread "owning" the monitor.
126 * If @use_io_thread, this is @mon_iothread. (This does not actually happen
127 * in the current state of the code.)
128 * Else, it's the main thread.
129 * These members can be safely accessed without locks.
130 */
131 ReadLineState *rs;
132 };
133
134 typedef struct {
135 Monitor common;
136 JSONMessageParser parser;
137 bool pretty;
138 /*
139 * When a client connects, we're in capabilities negotiation mode.
140 * @commands is &qmp_cap_negotiation_commands then. When command
141 * qmp_capabilities succeeds, we go into command mode, and
142 * @command becomes &qmp_commands.
143 */
144 const QmpCommandList *commands;
145 bool capab_offered[QMP_CAPABILITY__MAX]; /* capabilities offered */
146 bool capab[QMP_CAPABILITY__MAX]; /* offered and accepted */
147 /*
148 * Protects qmp request/response queue.
149 * Take monitor_lock first when you need both.
150 */
151 QemuMutex qmp_queue_lock;
152 /* Input queue that holds all the parsed QMP requests */
153 GQueue *qmp_requests;
154 } MonitorQMP;
155
156 /**
157 * Is @mon a QMP monitor?
158 */
monitor_is_qmp(const Monitor * mon)159 static inline bool monitor_is_qmp(const Monitor *mon)
160 {
161 return mon->is_qmp;
162 }
163
164 typedef QTAILQ_HEAD(MonitorList, Monitor) MonitorList;
165 extern IOThread *mon_iothread;
166 extern Coroutine *qmp_dispatcher_co;
167 extern bool qmp_dispatcher_co_shutdown;
168 extern QmpCommandList qmp_commands, qmp_cap_negotiation_commands;
169 extern QemuMutex monitor_lock;
170 extern MonitorList mon_list;
171
172 extern HMPCommand hmp_cmds[];
173
174 void monitor_data_init(Monitor *mon, bool is_qmp, bool skip_flush,
175 bool use_io_thread);
176 void monitor_data_destroy(Monitor *mon);
177 int monitor_can_read(void *opaque);
178 void monitor_list_append(Monitor *mon);
179 void monitor_fdsets_cleanup(void);
180
181 void qmp_send_response(MonitorQMP *mon, const QDict *rsp);
182 void monitor_data_destroy_qmp(MonitorQMP *mon);
183 void coroutine_fn monitor_qmp_dispatcher_co(void *data);
184 void qmp_dispatcher_co_wake(void);
185
186 int get_monitor_def(Monitor *mon, int64_t *pval, const char *name);
187 void handle_hmp_command(MonitorHMP *mon, const char *cmdline);
188 int hmp_compare_cmd(const char *name, const char *list);
189
190 #endif
191