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Iglesias" , xen-devel@lists.xenproject.org (open list:X86 Xen CPUs) Subject: [PATCH v3 08/10] chardev: introduce .chr_get_pty_name() handler Date: Thu, 15 Jan 2026 17:46:02 +0300 Message-ID: <20260115144606.233252-9-vsementsov@yandex-team.ru> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260115144606.233252-1-vsementsov@yandex-team.ru> References: <20260115144606.233252-1-vsementsov@yandex-team.ru> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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 (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=2a02:6b8:c41:1300:1:45:d181:df01; envelope-from=vsementsov@yandex-team.ru; helo=forwardcorp1d.mail.yandex.net X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @yandex-team.ru) X-ZM-MESSAGEID: 1768488431030158500 Currently we do two wrong things: 1. Abuse s->filename to get pty_name from it 2. Violate layering with help of CHARDEV_IS_PTY() Let's get rid of both, and introduce correct way to get pty name in generic code, if available. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Marc-Andr=C3=A9 Lureau --- chardev/char-pty.c | 7 +++++++ chardev/char.c | 19 +++++++++++++------ hw/char/xen_console.c | 7 ++++--- include/chardev/char.h | 7 +++++-- 4 files changed, 29 insertions(+), 11 deletions(-) diff --git a/chardev/char-pty.c b/chardev/char-pty.c index a582aa7bc7..047aade09e 100644 --- a/chardev/char-pty.c +++ b/chardev/char-pty.c @@ -387,6 +387,12 @@ static void pty_chr_parse(QemuOpts *opts, ChardevBacke= nd *backend, Error **errp) pty->path =3D g_strdup(path); } =20 +static char *pty_chr_get_pty_name(Chardev *chr) +{ + PtyChardev *s =3D PTY_CHARDEV(chr); + return g_strdup(s->pty_name); +} + static void char_pty_class_init(ObjectClass *oc, const void *data) { ChardevClass *cc =3D CHARDEV_CLASS(oc); @@ -396,6 +402,7 @@ static void char_pty_class_init(ObjectClass *oc, const = void *data) cc->chr_write =3D pty_chr_write; cc->chr_update_read_handler =3D pty_chr_update_read_handler; cc->chr_add_watch =3D pty_chr_add_watch; + cc->chr_get_pty_name =3D pty_chr_get_pty_name; } =20 static const TypeInfo char_pty_type_info =3D { diff --git a/chardev/char.c b/chardev/char.c index 44bfed3627..0dc792b88f 100644 --- a/chardev/char.c +++ b/chardev/char.c @@ -1090,9 +1090,7 @@ ChardevReturn *qmp_chardev_add(const char *id, Charde= vBackend *backend, } =20 ret =3D g_new0(ChardevReturn, 1); - if (CHARDEV_IS_PTY(chr)) { - ret->pty =3D g_strdup(chr->filename + 4); - } + ret->pty =3D qemu_chr_get_pty_name(chr); =20 return ret; =20 @@ -1101,6 +1099,17 @@ err: return NULL; } =20 +char *qemu_chr_get_pty_name(Chardev *chr) +{ + ChardevClass *cc =3D CHARDEV_GET_CLASS(chr); + + if (cc->chr_get_pty_name) { + return cc->chr_get_pty_name(chr); + } + + return NULL; +} + ChardevReturn *qmp_chardev_change(const char *id, ChardevBackend *backend, Error **errp) { @@ -1192,9 +1201,7 @@ ChardevReturn *qmp_chardev_change(const char *id, Cha= rdevBackend *backend, object_unref(OBJECT(chr_new)); =20 ret =3D g_new0(ChardevReturn, 1); - if (CHARDEV_IS_PTY(chr_new)) { - ret->pty =3D g_strdup(chr_new->filename + 4); - } + ret->pty =3D qemu_chr_get_pty_name(chr_new); =20 return ret; } diff --git a/hw/char/xen_console.c b/hw/char/xen_console.c index 8ee098d9ad..bdeb76dc87 100644 --- a/hw/char/xen_console.c +++ b/hw/char/xen_console.c @@ -418,6 +418,7 @@ static void xen_console_realize(XenDevice *xendev, Erro= r **errp) XenConsole *con =3D XEN_CONSOLE_DEVICE(xendev); Chardev *cs =3D qemu_chr_fe_get_driver(&con->chr); unsigned int u; + g_autofree char *pty_name =3D NULL; =20 if (!cs) { error_setg(errp, "no backing character device"); @@ -450,9 +451,9 @@ static void xen_console_realize(XenDevice *xendev, Erro= r **errp) =20 trace_xen_console_realize(con->dev, object_get_typename(OBJECT(cs))); =20 - if (CHARDEV_IS_PTY(cs)) { - /* Strip the leading 'pty:' */ - xen_device_frontend_printf(xendev, "tty", "%s", cs->filename + 4); + pty_name =3D qemu_chr_get_pty_name(cs); + if (pty_name) { + xen_device_frontend_printf(xendev, "tty", "%s", pty_name); } =20 /* No normal PV driver initialization for the primary console under Xe= n */ diff --git a/include/chardev/char.h b/include/chardev/char.h index e1bf97222b..ada5529fa6 100644 --- a/include/chardev/char.h +++ b/include/chardev/char.h @@ -247,8 +247,6 @@ OBJECT_DECLARE_TYPE(Chardev, ChardevClass, CHARDEV) =20 #define CHARDEV_IS_RINGBUF(chr) \ object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_RINGBUF) -#define CHARDEV_IS_PTY(chr) \ - object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_PTY) =20 struct ChardevClass { ObjectClass parent_class; @@ -308,6 +306,9 @@ struct ChardevClass { void (*chr_be_event)(Chardev *s, QEMUChrEvent event); =20 void (*chr_listener_cleanup)(Chardev *chr); + + /* return PTY name if available */ + char *(*chr_get_pty_name)(Chardev *s); }; =20 Chardev *qemu_chardev_new(const char *id, const char *typename, @@ -322,4 +323,6 @@ GSource *qemu_chr_timeout_add_ms(Chardev *chr, guint ms, void suspend_mux_open(void); void resume_mux_open(void); =20 +char *qemu_chr_get_pty_name(Chardev *chr); + #endif --=20 2.52.0