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 } 77