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2f7b92a0 PB |
1 | /* |
2 | * Reset handlers. | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * Copyright (c) 2016 Red Hat, Inc. | |
6 | * | |
7 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
8 | * of this software and associated documentation files (the "Software"), to deal | |
9 | * in the Software without restriction, including without limitation the rights | |
10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
11 | * copies of the Software, and to permit persons to whom the Software is | |
12 | * furnished to do so, subject to the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be included in | |
15 | * all copies or substantial portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
23 | * THE SOFTWARE. | |
24 | */ | |
25 | ||
26 | #include "qemu/osdep.h" | |
27 | #include "qemu/queue.h" | |
28 | #include "sysemu/reset.h" | |
29 | ||
30 | /* reset/shutdown handler */ | |
31 | ||
32 | typedef struct QEMUResetEntry { | |
33 | QTAILQ_ENTRY(QEMUResetEntry) entry; | |
34 | QEMUResetHandler *func; | |
35 | void *opaque; | |
7966d70f | 36 | bool skip_on_snapshot_load; |
2f7b92a0 PB |
37 | } QEMUResetEntry; |
38 | ||
b58deb34 | 39 | static QTAILQ_HEAD(, QEMUResetEntry) reset_handlers = |
2f7b92a0 PB |
40 | QTAILQ_HEAD_INITIALIZER(reset_handlers); |
41 | ||
42 | void qemu_register_reset(QEMUResetHandler *func, void *opaque) | |
43 | { | |
b21e2380 | 44 | QEMUResetEntry *re = g_new0(QEMUResetEntry, 1); |
2f7b92a0 PB |
45 | |
46 | re->func = func; | |
47 | re->opaque = opaque; | |
48 | QTAILQ_INSERT_TAIL(&reset_handlers, re, entry); | |
49 | } | |
50 | ||
7966d70f JD |
51 | void qemu_register_reset_nosnapshotload(QEMUResetHandler *func, void *opaque) |
52 | { | |
53 | QEMUResetEntry *re = g_new0(QEMUResetEntry, 1); | |
54 | ||
55 | re->func = func; | |
56 | re->opaque = opaque; | |
57 | re->skip_on_snapshot_load = true; | |
58 | QTAILQ_INSERT_TAIL(&reset_handlers, re, entry); | |
59 | } | |
60 | ||
2f7b92a0 PB |
61 | void qemu_unregister_reset(QEMUResetHandler *func, void *opaque) |
62 | { | |
63 | QEMUResetEntry *re; | |
64 | ||
65 | QTAILQ_FOREACH(re, &reset_handlers, entry) { | |
66 | if (re->func == func && re->opaque == opaque) { | |
67 | QTAILQ_REMOVE(&reset_handlers, re, entry); | |
68 | g_free(re); | |
69 | return; | |
70 | } | |
71 | } | |
72 | } | |
73 | ||
7966d70f | 74 | void qemu_devices_reset(ShutdownCause reason) |
2f7b92a0 PB |
75 | { |
76 | QEMUResetEntry *re, *nre; | |
77 | ||
78 | /* reset all devices */ | |
79 | QTAILQ_FOREACH_SAFE(re, &reset_handlers, entry, nre) { | |
7966d70f JD |
80 | if (reason == SHUTDOWN_CAUSE_SNAPSHOT_LOAD && |
81 | re->skip_on_snapshot_load) { | |
82 | continue; | |
83 | } | |
2f7b92a0 PB |
84 | re->func(re->opaque); |
85 | } | |
86 | } | |
87 |