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b0292b85 KW |
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" | |
e5ab4347 | 27 | #include "qemu/job.h" |
b0292b85 | 28 | #include "qapi/qapi-commands-block-core.h" |
e5ab4347 KW |
29 | #include "qapi/qapi-visit-block-core.h" |
30 | #include "qapi/clone-visitor.h" | |
b0292b85 KW |
31 | #include "qapi/error.h" |
32 | ||
e5ab4347 KW |
33 | typedef struct BlockdevCreateJob { |
34 | Job common; | |
b0292b85 KW |
35 | BlockDriver *drv; |
36 | BlockdevCreateOptions *opts; | |
37 | int ret; | |
e5ab4347 | 38 | } BlockdevCreateJob; |
b0292b85 | 39 | |
e5ab4347 | 40 | static void blockdev_create_complete(Job *job, void *opaque) |
b0292b85 | 41 | { |
e5ab4347 KW |
42 | BlockdevCreateJob *s = container_of(job, BlockdevCreateJob, common); |
43 | ||
3d1f8b07 | 44 | job_completed(job, s->ret); |
b0292b85 KW |
45 | } |
46 | ||
f67432a2 | 47 | static int coroutine_fn blockdev_create_run(Job *job, Error **errp) |
b0292b85 | 48 | { |
f67432a2 | 49 | BlockdevCreateJob *s = container_of(job, BlockdevCreateJob, common); |
e5ab4347 KW |
50 | |
51 | job_progress_set_remaining(&s->common, 1); | |
3d1f8b07 | 52 | s->ret = s->drv->bdrv_co_create(s->opts, errp); |
e5ab4347 KW |
53 | job_progress_update(&s->common, 1); |
54 | ||
55 | qapi_free_BlockdevCreateOptions(s->opts); | |
56 | job_defer_to_main_loop(&s->common, blockdev_create_complete, NULL); | |
f67432a2 JS |
57 | |
58 | return s->ret; | |
e5ab4347 KW |
59 | } |
60 | ||
61 | static const JobDriver blockdev_create_job_driver = { | |
62 | .instance_size = sizeof(BlockdevCreateJob), | |
63 | .job_type = JOB_TYPE_CREATE, | |
f67432a2 | 64 | .run = blockdev_create_run, |
e5ab4347 KW |
65 | }; |
66 | ||
3fb588a0 KW |
67 | void qmp_blockdev_create(const char *job_id, BlockdevCreateOptions *options, |
68 | Error **errp) | |
e5ab4347 KW |
69 | { |
70 | BlockdevCreateJob *s; | |
b0292b85 KW |
71 | const char *fmt = BlockdevDriver_str(options->driver); |
72 | BlockDriver *drv = bdrv_find_format(fmt); | |
b0292b85 KW |
73 | |
74 | /* If the driver is in the schema, we know that it exists. But it may not | |
75 | * be whitelisted. */ | |
76 | assert(drv); | |
77 | if (bdrv_uses_whitelist() && !bdrv_is_whitelisted(drv, false)) { | |
78 | error_setg(errp, "Driver is not whitelisted"); | |
79 | return; | |
80 | } | |
81 | ||
e5ab4347 | 82 | /* Error out if the driver doesn't support .bdrv_co_create */ |
b0292b85 KW |
83 | if (!drv->bdrv_co_create) { |
84 | error_setg(errp, "Driver does not support blockdev-create"); | |
85 | return; | |
86 | } | |
87 | ||
e5ab4347 KW |
88 | /* Create the block job */ |
89 | /* TODO Running in the main context. Block drivers need to error out or add | |
90 | * locking when they use a BDS in a different AioContext. */ | |
91 | s = job_create(job_id, &blockdev_create_job_driver, NULL, | |
92 | qemu_get_aio_context(), JOB_DEFAULT | JOB_MANUAL_DISMISS, | |
93 | NULL, NULL, errp); | |
94 | if (!s) { | |
95 | return; | |
b0292b85 | 96 | } |
e5ab4347 KW |
97 | |
98 | s->drv = drv, | |
99 | s->opts = QAPI_CLONE(BlockdevCreateOptions, options), | |
100 | ||
101 | job_start(&s->common); | |
b0292b85 | 102 | } |