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bh=y/YfDeWEKfxnOfqzTNmbt0iCSJjBpcio8N+uDvPxTDI=; b=jGuHpKgbCb7gsZ3MJNj3EOELP7OVAch/0ZsJz2PI7v6eEcEp/PXA2BgryZuaH/Rc5zcClx 13zGGHFe+ovyV9l1I9esl9VRrA1/c3TUxyvDXivWmwqGtoU9E+yS5I+SZ/A5gn4SFxE3OS qx95qjo7j4Mn0PaJ0lvYubfA51zWIy4= X-MC-Unique: zt1085Q2Mqec9s4cJfFfxw-1 From: Kevin Wolf To: qemu-devel@nongnu.org Subject: [PATCH 07/13] char: Add qemu_chr_parse_cli_dict/str() Date: Thu, 12 Nov 2020 18:58:59 +0100 Message-Id: <20201112175905.404472-8-kwolf@redhat.com> In-Reply-To: <20201112175905.404472-1-kwolf@redhat.com> References: <20201112175905.404472-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 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" This adds a function that parses a command line definition of a character device into ChardevOptions, which can then be passed to qemu_chr_new_cli(). You can start both from a string (for actual CLI) or from a QDict, which is not only the intermediate representation after calling the keyval parser, but also what HMP handlers receive. Signed-off-by: Kevin Wolf --- include/chardev/char.h | 30 ++++++++++++++++++++++++++++ chardev/char.c | 45 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 75 insertions(+) diff --git a/include/chardev/char.h b/include/chardev/char.h index c0944f5828..5cd46207f6 100644 --- a/include/chardev/char.h +++ b/include/chardev/char.h @@ -94,6 +94,36 @@ Chardev *qemu_chr_new_from_opts(QemuOpts *opts, */ Chardev *qemu_chr_new_cli(ChardevOptions *options, Error **errp); =20 +/** + * qemu_chr_parse_cli_dict: + * @args: Options defining a new character device + * @help: true if help should be printed instead of returning ChardevOptio= ns + * + * Parses the given command line option QDict into ChardevOptions, using + * qemu_chr_translate_legacy_options() to maintain compatibility with + * legacy command line syntax. + * + * Returns: On successful conversion, a ChardevOptions object containing t= he + * requested options. NULL and @errp is unchanged if help was requested and + * printed. NULL and @errp is set in error cases. + */ +ChardevOptions *qemu_chr_parse_cli_dict(QDict *args, bool help, + Error **errp); + +/** + * qemu_chr_parse_cli_str: + * @optarg: Command line argument defining a new character device + * + * Parses the given command line option into ChardevOptions, using + * qemu_chr_translate_legacy_options() to maintain compatibility with + * legacy command line syntax. + * + * Returns: On successful conversion, a ChardevOptions object containing t= he + * requested options. NULL and @errp is unchanged if help was requested and + * printed. NULL and @errp is set in error cases. + */ +ChardevOptions *qemu_chr_parse_cli_str(const char *optarg, Error **errp); + /** * qemu_chr_translate_legacy_options: * @args: Character device creation options as returned by the keyval pars= er diff --git a/chardev/char.c b/chardev/char.c index 99feaae275..a5d6be9dc8 100644 --- a/chardev/char.c +++ b/chardev/char.c @@ -32,8 +32,10 @@ #include "chardev/char.h" #include "qapi/error.h" #include "qapi/qapi-commands-char.h" +#include "qapi/qapi-visit-char.h" #include "qapi/qmp/qdict.h" #include "qapi/qmp/qerror.h" +#include "qapi/qobject-input-visitor.h" #include "sysemu/replay.h" #include "qemu/help_option.h" #include "qemu/module.h" @@ -1106,6 +1108,49 @@ Chardev *qemu_chr_new_cli(ChardevOptions *options, E= rror **errp) return chardev_new_qapi(options->id, options->backend, errp); } =20 +ChardevOptions *qemu_chr_parse_cli_dict(QDict *args, bool help, + Error **errp) +{ + Visitor *v; + ChardevOptions *chr_options; + + qemu_chr_translate_legacy_options(args); + + 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(); + } + return NULL; + } + + v =3D qobject_input_visitor_new_keyval(QOBJECT(args)); + visit_type_ChardevOptions(v, NULL, &chr_options, errp); + visit_free(v); + + return chr_options; +} + +ChardevOptions *qemu_chr_parse_cli_str(const char *optarg, Error **errp) +{ + ERRP_GUARD(); + QDict *args; + ChardevOptions *chr_options; + bool help; + + args =3D keyval_parse(optarg, "backend", &help, errp); + if (!args) { + return NULL; + } + + chr_options =3D qemu_chr_parse_cli_dict(args, help, errp); + qobject_unref(args); + + return chr_options; +} + ChardevReturn *qmp_chardev_change(const char *id, ChardevBackend *backend, Error **errp) { --=20 2.28.0