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authorKevin Wolf <kwolf@redhat.com>2016-07-13 17:27:51 +0200
committerKevin Wolf <kwolf@redhat.com>2016-09-05 19:06:48 +0200
commite7f98f2f92827df9944402d1613a4e32fe50215b (patch)
treeff804f47216de6081e5dc9c5f77838c2179596a5 /hmp.c
parentc0088d79a7d0d9070a46331b60ec8aa871fe2085 (diff)
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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>
Diffstat (limited to 'hmp.c')
-rw-r--r--hmp.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/hmp.c b/hmp.c
index a7dfe6f..ad33b44 100644
--- a/hmp.c
+++ b/hmp.c
@@ -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);
}