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1 | /* | |
2 | * Block layer code related to image creation | |
3 | * | |
4 | * Copyright (c) 2018 Kevin Wolf <kwolf@redhat.com> | |
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 | #include "qemu/osdep.h" | |
26 | #include "block/block_int.h" | |
27 | #include "qapi/qapi-commands-block-core.h" | |
28 | #include "qapi/error.h" | |
29 | ||
30 | typedef struct BlockdevCreateCo { | |
31 | BlockDriver *drv; | |
32 | BlockdevCreateOptions *opts; | |
33 | int ret; | |
34 | Error **errp; | |
35 | } BlockdevCreateCo; | |
36 | ||
37 | static void coroutine_fn bdrv_co_create_co_entry(void *opaque) | |
38 | { | |
39 | BlockdevCreateCo *cco = opaque; | |
40 | cco->ret = cco->drv->bdrv_co_create(cco->opts, cco->errp); | |
41 | } | |
42 | ||
43 | void qmp_x_blockdev_create(BlockdevCreateOptions *options, Error **errp) | |
44 | { | |
45 | const char *fmt = BlockdevDriver_str(options->driver); | |
46 | BlockDriver *drv = bdrv_find_format(fmt); | |
47 | Coroutine *co; | |
48 | BlockdevCreateCo cco; | |
49 | ||
50 | /* If the driver is in the schema, we know that it exists. But it may not | |
51 | * be whitelisted. */ | |
52 | assert(drv); | |
53 | if (bdrv_uses_whitelist() && !bdrv_is_whitelisted(drv, false)) { | |
54 | error_setg(errp, "Driver is not whitelisted"); | |
55 | return; | |
56 | } | |
57 | ||
58 | /* Call callback if it exists */ | |
59 | if (!drv->bdrv_co_create) { | |
60 | error_setg(errp, "Driver does not support blockdev-create"); | |
61 | return; | |
62 | } | |
63 | ||
64 | cco = (BlockdevCreateCo) { | |
65 | .drv = drv, | |
66 | .opts = options, | |
67 | .ret = -EINPROGRESS, | |
68 | .errp = errp, | |
69 | }; | |
70 | ||
71 | co = qemu_coroutine_create(bdrv_co_create_co_entry, &cco); | |
72 | qemu_coroutine_enter(co); | |
73 | while (cco.ret == -EINPROGRESS) { | |
74 | aio_poll(qemu_get_aio_context(), true); | |
75 | } | |
76 | } |