Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging
[qemu/ar7.git] / block / amend.c
blob392df9ef83f5dd72cb67bfe73e1208b5928934e1
1 /*
2 * Block layer code related to image options amend
4 * Copyright (c) 2018 Kevin Wolf <kwolf@redhat.com>
5 * Copyright (c) 2020 Red Hat. Inc
7 * Heavily based on create.c
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this software and associated documentation files (the "Software"), to deal
11 * in the Software without restriction, including without limitation the rights
12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 * copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 * THE SOFTWARE.
28 #include "qemu/osdep.h"
29 #include "block/block_int.h"
30 #include "qemu/job.h"
31 #include "qemu/main-loop.h"
32 #include "qapi/qapi-commands-block-core.h"
33 #include "qapi/qapi-visit-block-core.h"
34 #include "qapi/clone-visitor.h"
35 #include "qapi/error.h"
37 typedef struct BlockdevAmendJob {
38 Job common;
39 BlockdevAmendOptions *opts;
40 BlockDriverState *bs;
41 bool force;
42 } BlockdevAmendJob;
44 static int coroutine_fn blockdev_amend_run(Job *job, Error **errp)
46 BlockdevAmendJob *s = container_of(job, BlockdevAmendJob, common);
47 int ret;
49 job_progress_set_remaining(&s->common, 1);
50 ret = s->bs->drv->bdrv_co_amend(s->bs, s->opts, s->force, errp);
51 job_progress_update(&s->common, 1);
52 qapi_free_BlockdevAmendOptions(s->opts);
53 return ret;
56 static const JobDriver blockdev_amend_job_driver = {
57 .instance_size = sizeof(BlockdevAmendJob),
58 .job_type = JOB_TYPE_AMEND,
59 .run = blockdev_amend_run,
62 void qmp_x_blockdev_amend(const char *job_id,
63 const char *node_name,
64 BlockdevAmendOptions *options,
65 bool has_force,
66 bool force,
67 Error **errp)
69 BlockdevAmendJob *s;
70 const char *fmt = BlockdevDriver_str(options->driver);
71 BlockDriver *drv = bdrv_find_format(fmt);
72 BlockDriverState *bs;
74 bs = bdrv_lookup_bs(NULL, node_name, errp);
75 if (!bs) {
76 return;
79 if (!drv) {
80 error_setg(errp, "Block driver '%s' not found or not supported", fmt);
81 return;
85 * If the driver is in the schema, we know that it exists. But it may not
86 * be whitelisted.
88 if (bdrv_uses_whitelist() && !bdrv_is_whitelisted(drv, false)) {
89 error_setg(errp, "Driver is not whitelisted");
90 return;
93 if (bs->drv != drv) {
94 error_setg(errp,
95 "x-blockdev-amend doesn't support changing the block driver");
96 return;
99 /* Error out if the driver doesn't support .bdrv_co_amend */
100 if (!drv->bdrv_co_amend) {
101 error_setg(errp, "Driver does not support x-blockdev-amend");
102 return;
105 /* Create the block job */
106 s = job_create(job_id, &blockdev_amend_job_driver, NULL,
107 bdrv_get_aio_context(bs), JOB_DEFAULT | JOB_MANUAL_DISMISS,
108 NULL, NULL, errp);
109 if (!s) {
110 return;
113 s->bs = bs,
114 s->opts = QAPI_CLONE(BlockdevAmendOptions, options),
115 s->force = has_force ? force : false;
116 job_start(&s->common);