scsi: pvscsi: check command descriptor ring buffer size (CVE-2016-4952)
[qemu.git] / qga / guest-agent-command-state.c
1 /*
2 * QEMU Guest Agent command state interfaces
3 *
4 * Copyright IBM Corp. 2011
5 *
6 * Authors:
7 * Michael Roth <mdroth@linux.vnet.ibm.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
10 * See the COPYING file in the top-level directory.
11 */
12 #include "qemu/osdep.h"
13 #include <glib.h>
14 #include "qga/guest-agent-core.h"
15
16 struct GACommandState {
17 GSList *groups;
18 };
19
20 typedef struct GACommandGroup {
21 void (*init)(void);
22 void (*cleanup)(void);
23 } GACommandGroup;
24
25 /* handle init/cleanup for stateful guest commands */
26
27 void ga_command_state_add(GACommandState *cs,
28 void (*init)(void),
29 void (*cleanup)(void))
30 {
31 GACommandGroup *cg = g_new0(GACommandGroup, 1);
32 cg->init = init;
33 cg->cleanup = cleanup;
34 cs->groups = g_slist_append(cs->groups, cg);
35 }
36
37 static void ga_command_group_init(gpointer opaque, gpointer unused)
38 {
39 GACommandGroup *cg = opaque;
40
41 g_assert(cg);
42 if (cg->init) {
43 cg->init();
44 }
45 }
46
47 void ga_command_state_init_all(GACommandState *cs)
48 {
49 g_assert(cs);
50 g_slist_foreach(cs->groups, ga_command_group_init, NULL);
51 }
52
53 static void ga_command_group_cleanup(gpointer opaque, gpointer unused)
54 {
55 GACommandGroup *cg = opaque;
56
57 g_assert(cg);
58 if (cg->cleanup) {
59 cg->cleanup();
60 }
61 }
62
63 void ga_command_state_cleanup_all(GACommandState *cs)
64 {
65 g_assert(cs);
66 g_slist_foreach(cs->groups, ga_command_group_cleanup, NULL);
67 }
68
69 GACommandState *ga_command_state_new(void)
70 {
71 GACommandState *cs = g_new0(GACommandState, 1);
72 cs->groups = NULL;
73 return cs;
74 }