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bh=Ju/zUz4WV6Xpyt9SLR2+0kWGkq1VbMdgXDidWAcL9Y8=; b=GLWxGJngrnVswGm2NHAlNY3Y+FWeXhGwj+f9Rx/1WkwaSLV2WAkxiYb8vH6bZRrxfJhMxu wXQf34TEzcHK4VaW8nVk4w1vliWPnQ8McwYGgn1kiql4fkKvMGbNEVI9H5p9o8P5TjiZ9a UA6nJYZ5Ud7pQrhRKYaxx+PPvGGfW90= X-MC-Unique: 4d765uq9P5C8KZ2Gwsl5TA-1 From: Eric Blake To: qemu-devel@nongnu.org Subject: [PATCH v5 03/12] nbd: Utilize QAPI_CLONE for type conversion Date: Fri, 23 Oct 2020 13:36:43 -0500 Message-Id: <20201023183652.478921-4-eblake@redhat.com> In-Reply-To: <20201023183652.478921-1-eblake@redhat.com> References: <20201023183652.478921-1-eblake@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eblake@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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charset="utf-8" Rather than open-coding the translation from the deprecated NbdServerAddOptions type to the preferred BlockExportOptionsNbd, it's better to utilize QAPI_CLONE_MEMBERS. This solves a couple of issues: first, if we do any more refactoring of the base type (which an upcoming patch plans to do), we don't have to revisit the open-coding. Second, our assignment to arg->name is fishy: the generated QAPI code currently does not visit it if arg->has_name is false, but if it DID visit it, we would have introduced a double-free situation when arg is finally freed. Signed-off-by: Eric Blake Reviewed-by: Markus Armbruster Reviewed-by: Vladimir Sementsov-Ogievskiy --- blockdev-nbd.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/blockdev-nbd.c b/blockdev-nbd.c index 8174023e5c47..cee9134b12eb 100644 --- a/blockdev-nbd.c +++ b/blockdev-nbd.c @@ -14,6 +14,8 @@ #include "sysemu/block-backend.h" #include "hw/block/block.h" #include "qapi/error.h" +#include "qapi/clone-visitor.h" +#include "qapi/qapi-visit-block-export.h" #include "qapi/qapi-commands-block-export.h" #include "block/nbd.h" #include "io/channel-socket.h" @@ -195,7 +197,8 @@ void qmp_nbd_server_add(NbdServerAddOptions *arg, Error= **errp) * the device name as a default here for compatibility. */ if (!arg->has_name) { - arg->name =3D arg->device; + arg->has_name =3D true; + arg->name =3D g_strdup(arg->device); } export_opts =3D g_new(BlockExportOptions, 1); @@ -205,15 +208,9 @@ void qmp_nbd_server_add(NbdServerAddOptions *arg, Erro= r **errp) .node_name =3D g_strdup(bdrv_get_node_name(bs)), .has_writable =3D arg->has_writable, .writable =3D arg->writable, - .u.nbd =3D { - .has_name =3D true, - .name =3D g_strdup(arg->name), - .has_description =3D arg->has_description, - .description =3D g_strdup(arg->description), - .has_bitmap =3D arg->has_bitmap, - .bitmap =3D g_strdup(arg->bitmap), - }, }; + QAPI_CLONE_MEMBERS(BlockExportOptionsNbd, &export_opts->u.nbd, + qapi_NbdServerAddOptions_base(arg)); /* * nbd-server-add doesn't complain when a read-only device should be --=20 2.29.0