1 #include <kvm/util.h>
2 #include <kvm/kvm-cmd.h>
3 #include <kvm/builtin-pause.h>
4 #include <kvm/builtin-list.h>
5 #include <kvm/kvm.h>
6 #include <kvm/parse-options.h>
7 #include <kvm/kvm-ipc.h>
8
9 #include <stdio.h>
10 #include <string.h>
11 #include <signal.h>
12
13 static bool all;
14 static const char *instance_name;
15
16 static const char * const pause_usage[] = {
17 "lkvm pause [--all] [-n name]",
18 NULL
19 };
20
21 static const struct option pause_options[] = {
22 OPT_GROUP("General options:"),
23 OPT_BOOLEAN('a', "all", &all, "Pause all instances"),
24 OPT_STRING('n', "name", &instance_name, "name", "Instance name"),
25 OPT_END()
26 };
27
parse_pause_options(int argc,const char ** argv)28 static void parse_pause_options(int argc, const char **argv)
29 {
30 while (argc != 0) {
31 argc = parse_options(argc, argv, pause_options, pause_usage,
32 PARSE_OPT_STOP_AT_NON_OPTION);
33 if (argc != 0)
34 kvm_pause_help();
35 }
36 }
37
kvm_pause_help(void)38 void kvm_pause_help(void)
39 {
40 usage_with_options(pause_usage, pause_options);
41 }
42
do_pause(const char * name,int sock)43 static int do_pause(const char *name, int sock)
44 {
45 int r;
46 int vmstate;
47
48 vmstate = get_vmstate(sock);
49 if (vmstate < 0)
50 return vmstate;
51 if (vmstate == KVM_VMSTATE_PAUSED) {
52 printf("Guest %s is already paused.\n", name);
53 return 0;
54 }
55
56 r = kvm_ipc__send(sock, KVM_IPC_PAUSE);
57 if (r)
58 return r;
59
60 printf("Guest %s paused\n", name);
61
62 return 0;
63 }
64
kvm_cmd_pause(int argc,const char ** argv,const char * prefix)65 int kvm_cmd_pause(int argc, const char **argv, const char *prefix)
66 {
67 int instance;
68 int r;
69
70 parse_pause_options(argc, argv);
71
72 if (all)
73 return kvm__enumerate_instances(do_pause);
74
75 if (instance_name == NULL)
76 kvm_pause_help();
77
78 instance = kvm__get_sock_by_instance(instance_name);
79
80 if (instance <= 0)
81 die("Failed locating instance");
82
83 r = do_pause(instance_name, instance);
84
85 close(instance);
86
87 return r;
88 }
89