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block: Allow node name for 'qemu-io' HMP command 

When using a node name, create a temporary BlockBackend that is used to
run the qemu-io command.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Kevin Wolf 2016-07-13 17:27:51 +02:00
parent c0088d79a7
commit e7f98f2f92
1 changed files with 13 additions and 0 deletions
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13
hmp.c
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@ -1923,11 +1923,22 @@ void hmp_chardev_remove(Monitor *mon, const QDict *qdict)
void hmp_qemu_io(Monitor *mon, const QDict *qdict)
{
BlockBackend *blk;
BlockBackend *local_blk = NULL;
const char* device = qdict_get_str(qdict, "device");
const char* command = qdict_get_str(qdict, "command");
Error *err = NULL;
blk = blk_by_name(device);
if (!blk) {
BlockDriverState *bs = bdrv_lookup_bs(NULL, device, &err);
if (bs) {
blk = local_blk = blk_new();
blk_insert_bs(blk, bs);
} else {
goto fail;
}
}
if (blk) {
AioContext *aio_context = blk_get_aio_context(blk);
aio_context_acquire(aio_context);
@ -1940,6 +1951,8 @@ void hmp_qemu_io(Monitor *mon, const QDict *qdict)
"Device '%s' not found", device);
}
fail:
blk_unref(local_blk);
hmp_handle_error(mon, &err);
}