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bh=3bxXrlpPLMCF09ngrKuqRoNt3ETWF66Y7x7LfysZEGQ=; b=ad0uoqjSzQhMw5cGN+pc51fY/xPHy1ffnCSgDP8vO7n7aNemfQK37QwumjwC/1qleCMEtP pMQmWqGT6NGQGQBPY5LslmU7JJMARKvAgpwIls6Yvryb4WpkRPh81gvDAU3sQVkBUvuh6G 2VPmOLQAZOOBk5YhUK1Fyq2YhepF/j8= X-MC-Unique: C_xDghIuMvCaL0JfWogz1A-1 From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PATCH 6/6] qemu-storage-daemon: Use qmp_chardev_add() for --chardev Date: Fri, 23 Oct 2020 12:12:22 +0200 Message-Id: <20201023101222.250147-7-kwolf@redhat.com> In-Reply-To: <20201023101222.250147-1-kwolf@redhat.com> References: <20201023101222.250147-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@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" While this makes the code quite a bit longer and arguably isn't very elegant, it removes the dependency on QemuOpts from the --chardev option of the storage daemon. Going through qmp_chardev_add() already now ensures that semantics and accessible features won't change incompatibly once we QAPIfy it fully. Note that there are a few differences between the command line option -chardev in the system emulator and chardev-add in QMP. The --chardev option of qemu-storage-daemon will follow QMP in these respects: * All chardev types using ChardevHostdev accept a "path" option on the command line, but QMP renamed it to "device" * ChardevSocket: - Intentionally different defaults (documented as such): server=3Dfalse and wait=3Dtrue (if server=3Dtrue) on the command line, but server=3Dtr= ue and wait=3Dfalse in QMP. - Accidentally different defaults: tight=3Dtrue on the command line, but tight=3Dfalse in QMP (this is a bug in commit 776b97d3). - QMP has a nested SocketAddressLegacy field, whereas the command line accepts "path"/"host"/"port"/"fd"/etc. on the top level. - The command line has a "delay" option, but QMP has "nodelay" * ChardevUdp has two SocketAddressLegacy fields, the command line has "host"/"port"/"localaddr"/"localport" on the top level with defaults for values that are mandatory in SocketAddressLegacy Signed-off-by: Kevin Wolf Reviewed-by: Markus Armbruster --- storage-daemon/qemu-storage-daemon.c | 47 ++++++++++++++++++++++------ 1 file changed, 38 insertions(+), 9 deletions(-) diff --git a/storage-daemon/qemu-storage-daemon.c b/storage-daemon/qemu-sto= rage-daemon.c index e419ba9f19..b543c30951 100644 --- a/storage-daemon/qemu-storage-daemon.c +++ b/storage-daemon/qemu-storage-daemon.c @@ -37,6 +37,7 @@ #include "qapi/error.h" #include "qapi/qapi-visit-block-core.h" #include "qapi/qapi-visit-block-export.h" +#include "qapi/qapi-visit-char.h" #include "qapi/qapi-visit-control.h" #include "qapi/qmp/qdict.h" #include "qapi/qmp/qstring.h" @@ -207,18 +208,46 @@ static void process_options(int argc, char *argv[]) } case OPTION_CHARDEV: { - /* TODO This interface is not stable until we QAPIfy it */ - QemuOpts *opts =3D qemu_opts_parse_noisily(&qemu_chardev_o= pts, - optarg, true); - if (opts =3D=3D NULL) { - exit(EXIT_FAILURE); - } + QDict *args; + Visitor *v; + ChardevBackend *chr_options; + char *id; + bool help; =20 - if (!qemu_chr_new_from_opts(opts, NULL, &error_fatal)) { - /* No error, but NULL returned means help was printed = */ + args =3D keyval_parse(optarg, "type", &help, &error_fatal); + if (help) { + if (qdict_haskey(args, "type")) { + /* TODO Print help based on the QAPI schema */ + qemu_opts_print_help(&qemu_chardev_opts, true); + } else { + qemu_chr_print_types(); + } exit(EXIT_SUCCESS); } - qemu_opts_del(opts); + + /* + * TODO Flattened version of chardev-add in the QAPI schema + * + * While it's not there, parse 'id' manually from the QDict + * and treat everything else as the 'backend' option for + * chardev-add. + */ + id =3D g_strdup(qdict_get_try_str(args, "id")); + if (!id) { + error_report("Parameter 'id' is missing"); + exit(EXIT_FAILURE); + } + qdict_del(args, "id"); + + v =3D qobject_input_visitor_new_keyval(QOBJECT(args)); + visit_set_flat_simple_unions(v, true); + visit_type_ChardevBackend(v, NULL, &chr_options, &error_fa= tal); + visit_free(v); + + qmp_chardev_add(id, chr_options, &error_fatal); + qapi_free_ChardevBackend(chr_options); + g_free(id); + qobject_unref(args); break; } case OPTION_EXPORT: --=20 2.28.0