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bh=K8eOK5P/i5aRC81NFyyuDcyo3cTjFzaugC2LKN0TEuQ=; b=iDZlT0nX5ImtF1/c4U4hujAKrASNVPWPMjKAPIJlu+uEGEpPldL9y1uKCOGyGr/mLZJVj/ KWOeYSpsXGRnOw5kifoRDtdEB0yKCDQ5DhtM9sioS7LDq7sJXkxUb7ntc6W2xEiNlUzRmw WdA90NAXkzHW2AbA+XceNCFWIDV1XaY= X-MC-Unique: IRr0tKN-OKO1Am6g1pXssQ-1 From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PATCH 05/28] qemu-option: warn for short-form boolean options Date: Wed, 2 Dec 2020 04:02:42 -0500 Message-Id: <20201202090305.4129317-6-pbonzini@redhat.com> In-Reply-To: <20201202090305.4129317-1-pbonzini@redhat.com> References: <20201202090305.4129317-1-pbonzini@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@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; helo=lists.gnu.org; Received-SPF: pass client-ip=63.128.21.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.497, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, imammedo@redhat.com, armbru@redhat.com, qemu-block@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Options such as "server" or "nowait", that are commonly found in -chardev, are sugar for "server=3Don" and "wait=3Doff". This is quite surprising and also does not have any notion of typing attached. It is even possible to do "-device e1000,noid" and get a device with "id=3Doff". Deprecate it and print a warning when it is encountered. In general, this short form for boolean options only seems to be in wide use for -chardev and -spice. Signed-off-by: Paolo Bonzini --- docs/system/deprecated.rst | 6 ++++++ tests/test-qemu-opts.c | 2 +- util/qemu-option.c | 29 ++++++++++++++++++----------- 3 files changed, 25 insertions(+), 12 deletions(-) diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst index 565389697e..ced4fa23a5 100644 --- a/docs/system/deprecated.rst +++ b/docs/system/deprecated.rst @@ -146,6 +146,12 @@ Drives with interface types other than ``if=3Dnone`` a= re for onboard devices. It is possible to use drives the board doesn't pick up with -device. This usage is now deprecated. Use ``if=3Dnone`` instead. =20 +Short-form boolean options (since 5.2) +'''''''''''''''''''''''''''''''''''''' + +Boolean options such as ``share=3Don``/``share=3Doff`` can be written +in short form as ``share`` and ``noshare``. This is deprecated +and will cause a warning. =20 QEMU Machine Protocol (QMP) commands ------------------------------------ diff --git a/tests/test-qemu-opts.c b/tests/test-qemu-opts.c index 2aab831d10..8bbb17b1c7 100644 --- a/tests/test-qemu-opts.c +++ b/tests/test-qemu-opts.c @@ -515,7 +515,7 @@ static void test_opts_parse(void) error_free_or_abort(&err); g_assert(!opts); =20 - /* Implied value */ + /* Implied value (qemu_opts_parse warns but accepts it) */ opts =3D qemu_opts_parse(&opts_list_03, "an,noaus,noaus=3D", false, &error_abort); g_assert_cmpuint(opts_count(opts), =3D=3D, 3); diff --git a/util/qemu-option.c b/util/qemu-option.c index 5f27d4369d..40564a12eb 100644 --- a/util/qemu-option.c +++ b/util/qemu-option.c @@ -756,10 +756,12 @@ void qemu_opts_print(QemuOpts *opts, const char *sepa= rator) =20 static const char *get_opt_name_value(const char *params, const char *firstname, + bool warn_on_flag, bool *help_wanted, char **name, char **value) { const char *p; + const char *prefix =3D ""; size_t len; bool is_help =3D false; =20 @@ -776,10 +778,15 @@ static const char *get_opt_name_value(const char *par= ams, if (strncmp(*name, "no", 2) =3D=3D 0) { memmove(*name, *name + 2, strlen(*name + 2) + 1); *value =3D g_strdup("off"); + prefix =3D "no"; } else { *value =3D g_strdup("on"); is_help =3D is_help_option(*name); } + if (!is_help && warn_on_flag) { + warn_report("short-form boolean option '%s%s' deprecated",= prefix, *name); + error_printf("Please use %s=3D%s instead\n", *name, *value= ); + } } } else { /* found "foo=3Dbar,more" */ @@ -801,14 +808,14 @@ static const char *get_opt_name_value(const char *par= ams, =20 static bool opts_do_parse(QemuOpts *opts, const char *params, const char *firstname, bool prepend, - bool *help_wanted, Error **errp) + bool warn_on_flag, bool *help_wanted, Error **er= rp) { char *option, *value; const char *p; QemuOpt *opt; =20 for (p =3D params; *p;) { - p =3D get_opt_name_value(p, firstname, help_wanted, &option, &valu= e); + p =3D get_opt_name_value(p, firstname, warn_on_flag, help_wanted, = &option, &value); if (help_wanted && *help_wanted) { g_free(option); g_free(value); @@ -839,7 +846,7 @@ static char *opts_parse_id(const char *params) char *name, *value; =20 for (p =3D params; *p;) { - p =3D get_opt_name_value(p, NULL, NULL, &name, &value); + p =3D get_opt_name_value(p, NULL, false, NULL, &name, &value); if (!strcmp(name, "id")) { g_free(name); return value; @@ -858,7 +865,7 @@ bool has_help_option(const char *params) bool ret =3D false; =20 for (p =3D params; *p;) { - p =3D get_opt_name_value(p, NULL, &ret, &name, &value); + p =3D get_opt_name_value(p, NULL, false, &ret, &name, &value); g_free(name); g_free(value); if (ret) { @@ -878,12 +885,12 @@ bool has_help_option(const char *params) bool qemu_opts_do_parse(QemuOpts *opts, const char *params, const char *firstname, Error **errp) { - return opts_do_parse(opts, params, firstname, false, NULL, errp); + return opts_do_parse(opts, params, firstname, false, false, NULL, errp= ); } =20 static QemuOpts *opts_parse(QemuOptsList *list, const char *params, bool permit_abbrev, bool defaults, - bool *help_wanted, Error **errp) + bool warn_on_flag, bool *help_wanted, Error **= errp) { const char *firstname; char *id =3D opts_parse_id(params); @@ -906,8 +913,8 @@ static QemuOpts *opts_parse(QemuOptsList *list, const c= har *params, return NULL; } =20 - if (!opts_do_parse(opts, params, firstname, defaults, help_wanted, - errp)) { + if (!opts_do_parse(opts, params, firstname, defaults, + warn_on_flag, help_wanted, errp)) { qemu_opts_del(opts); return NULL; } @@ -925,7 +932,7 @@ static QemuOpts *opts_parse(QemuOptsList *list, const c= har *params, QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params, bool permit_abbrev, Error **errp) { - return opts_parse(list, params, permit_abbrev, false, NULL, errp); + return opts_parse(list, params, permit_abbrev, false, false, NULL, err= p); } =20 /** @@ -943,7 +950,7 @@ QemuOpts *qemu_opts_parse_noisily(QemuOptsList *list, c= onst char *params, QemuOpts *opts; bool help_wanted =3D false; =20 - opts =3D opts_parse(list, params, permit_abbrev, false, + opts =3D opts_parse(list, params, permit_abbrev, false, true, opts_accepts_any(list) ? NULL : &help_wanted, &err); if (!opts) { @@ -962,7 +969,7 @@ void qemu_opts_set_defaults(QemuOptsList *list, const c= har *params, { QemuOpts *opts; =20 - opts =3D opts_parse(list, params, permit_abbrev, true, NULL, NULL); + opts =3D opts_parse(list, params, permit_abbrev, true, false, NULL, NU= LL); assert(opts); } =20 --=20 2.26.2