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| 1 | +/* |
| 2 | + * Block layer code related to image options amend |
| 3 | + * |
| 4 | + * Copyright (c) 2018 Kevin Wolf <[email protected]> |
| 5 | + * Copyright (c) 2020 Red Hat. Inc |
| 6 | + * |
| 7 | + * Heavily based on create.c |
| 8 | + * |
| 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: |
| 15 | + * |
| 16 | + * The above copyright notice and this permission notice shall be included in |
| 17 | + * all copies or substantial portions of the Software. |
| 18 | + * |
| 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. |
| 26 | + */ |
| 27 | + |
| 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" |
| 36 | + |
| 37 | +typedef struct BlockdevAmendJob { |
| 38 | + Job common; |
| 39 | + BlockdevAmendOptions *opts; |
| 40 | + BlockDriverState *bs; |
| 41 | + bool force; |
| 42 | +} BlockdevAmendJob; |
| 43 | + |
| 44 | +static int coroutine_fn blockdev_amend_run(Job *job, Error **errp) |
| 45 | +{ |
| 46 | + BlockdevAmendJob *s = container_of(job, BlockdevAmendJob, common); |
| 47 | + int ret; |
| 48 | + |
| 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; |
| 54 | +} |
| 55 | + |
| 56 | +static const JobDriver blockdev_amend_job_driver = { |
| 57 | + .instance_size = sizeof(BlockdevAmendJob), |
| 58 | + .job_type = JOB_TYPE_AMEND, |
| 59 | + .run = blockdev_amend_run, |
| 60 | +}; |
| 61 | + |
| 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) |
| 68 | +{ |
| 69 | + BlockdevAmendJob *s; |
| 70 | + const char *fmt = BlockdevDriver_str(options->driver); |
| 71 | + BlockDriver *drv = bdrv_find_format(fmt); |
| 72 | + BlockDriverState *bs = bdrv_find_node(node_name); |
| 73 | + |
| 74 | + |
| 75 | + if (!drv) { |
| 76 | + error_setg(errp, "Block driver '%s' not found or not supported", fmt); |
| 77 | + return; |
| 78 | + } |
| 79 | + |
| 80 | + /* |
| 81 | + * If the driver is in the schema, we know that it exists. But it may not |
| 82 | + * be whitelisted. |
| 83 | + */ |
| 84 | + if (bdrv_uses_whitelist() && !bdrv_is_whitelisted(drv, false)) { |
| 85 | + error_setg(errp, "Driver is not whitelisted"); |
| 86 | + return; |
| 87 | + } |
| 88 | + |
| 89 | + if (bs->drv != drv) { |
| 90 | + error_setg(errp, |
| 91 | + "x-blockdev-amend doesn't support changing the block driver"); |
| 92 | + return; |
| 93 | + } |
| 94 | + |
| 95 | + /* Error out if the driver doesn't support .bdrv_co_amend */ |
| 96 | + if (!drv->bdrv_co_amend) { |
| 97 | + error_setg(errp, "Driver does not support x-blockdev-amend"); |
| 98 | + return; |
| 99 | + } |
| 100 | + |
| 101 | + /* Create the block job */ |
| 102 | + s = job_create(job_id, &blockdev_amend_job_driver, NULL, |
| 103 | + bdrv_get_aio_context(bs), JOB_DEFAULT | JOB_MANUAL_DISMISS, |
| 104 | + NULL, NULL, errp); |
| 105 | + if (!s) { |
| 106 | + return; |
| 107 | + } |
| 108 | + |
| 109 | + s->bs = bs, |
| 110 | + s->opts = QAPI_CLONE(BlockdevAmendOptions, options), |
| 111 | + s->force = has_force ? force : false; |
| 112 | + job_start(&s->common); |
| 113 | +} |
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