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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1783346402; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=5bXxssTyYnkBlVt7qMbDcqHrgRdotP9+q0aAJz51+aM=; b=Zqv7/vHKCXCoqLBc/L7qT1Cq5o+REKPzC+ALP0X/m4f6R1UOfAdCvf5SdbHzklFwB49T36 D7EXqMiOqpRx7IhHGlgqoDAkONRwhMqNB3jL1zQIKsTJROOPLiaAV4tpTynoSt+2B5OdTf xTYsaHfLAP834QKZuzUhDMKdoae6SOw= X-MC-Unique: TUQ63APWPAGadHFHiPRw3A-1 X-Mimecast-MFC-AGG-ID: TUQ63APWPAGadHFHiPRw3A_1783346397 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= To: qemu-devel@nongnu.org Cc: Christian Brauner , devel@lists.libvirt.org, =?UTF-8?q?Alex=20Benn=C3=A9e?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Paolo Bonzini , Peter Krempa , Markus Armbruster , "Dr. David Alan Gilbert" , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Subject: [PATCH v7 22/35] monitor: eliminate monitor_is_hmp_non_interactive method Date: Mon, 6 Jul 2026 14:58:10 +0100 Message-ID: <20260706135824.2623960-23-berrange@redhat.com> In-Reply-To: <20260706135824.2623960-1-berrange@redhat.com> References: <20260706135824.2623960-1-berrange@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 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=lists1p.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.445, 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_PASS=-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 @redhat.com) X-ZM-MESSAGEID: 1783346488401158500 The monitor_is_hmp_non_interactive method is used by monitor_suspend and monitor_resume, to make them a no-op if the HMP does not use readline. There are only a handful of callers of suspend/resume and they can be made to skip the call when readline is not present. Reviewed-by: Marc-Andr=C3=A9 Lureau Tested-by: Peter Krempa Signed-off-by: Daniel P. Berrang=C3=A9 --- include/monitor/monitor.h | 2 +- migration/migration-hmp-cmds.c | 5 ++++- monitor/hmp-cmds.c | 5 ++++- monitor/hmp.c | 11 ++++++++--- monitor/monitor.c | 30 +----------------------------- 5 files changed, 18 insertions(+), 35 deletions(-) diff --git a/include/monitor/monitor.h b/include/monitor/monitor.h index e802e8dfb2..890497b0d2 100644 --- a/include/monitor/monitor.h +++ b/include/monitor/monitor.h @@ -37,7 +37,7 @@ int monitor_new(MonitorOptions *opts, bool allow_hmp, Err= or **errp); int monitor_new_opts(QemuOpts *opts, Error **errp); void monitor_cleanup(void); =20 -int monitor_suspend(Monitor *mon); +void monitor_suspend(Monitor *mon); void monitor_resume(Monitor *mon); =20 int monitor_get_fd(Monitor *mon, const char *fdname, Error **errp); diff --git a/migration/migration-hmp-cmds.c b/migration/migration-hmp-cmds.c index 8b385f560e..502ca704da 100644 --- a/migration/migration-hmp-cmds.c +++ b/migration/migration-hmp-cmds.c @@ -19,6 +19,7 @@ #include "monitor/hmp.h" #include "monitor/hmp-completion.h" #include "monitor/monitor.h" +#include "monitor/monitor-internal.h" #include "qapi/error.h" #include "qapi/qapi-commands-migration.h" #include "qapi/qapi-visit-migration.h" @@ -853,12 +854,14 @@ void hmp_migrate(Monitor *mon, const QDict *qdict) =20 if (!detach) { HMPMigrationStatus *status; + MonitorHMP *hmp =3D MONITOR_HMP(mon); =20 - if (monitor_suspend(mon) < 0) { + if (!hmp->use_readline) { monitor_printf(mon, "terminal does not allow synchronous " "migration, continuing detached\n"); return; } + monitor_suspend(mon); =20 status =3D g_malloc0(sizeof(*status)); status->mon =3D mon; diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c index e139caeba9..e9fb8d827a 100644 --- a/monitor/hmp-cmds.c +++ b/monitor/hmp-cmds.c @@ -129,7 +129,10 @@ void hmp_info_version(Monitor *mon, const QDict *qdict) =20 void hmp_quit(Monitor *mon, const QDict *qdict) { - monitor_suspend(mon); + MonitorHMP *hmp =3D MONITOR_HMP(mon); + if (hmp->use_readline) { + monitor_suspend(mon); + } qmp_quit(NULL); } =20 diff --git a/monitor/hmp.c b/monitor/hmp.c index 4636165d0b..a51de8e467 100644 --- a/monitor/hmp.c +++ b/monitor/hmp.c @@ -1528,13 +1528,16 @@ static void monitor_read(void *opaque, const uint8_= t *buf, int size) static void monitor_event(void *opaque, QEMUChrEvent event) { Monitor *mon =3D opaque; + MonitorHMP *hmp =3D MONITOR_HMP(mon); =20 switch (event) { case CHR_EVENT_MUX_IN: qemu_mutex_lock(&mon->mon_lock); if (mon->mux_out) { mon->mux_out =3D 0; - monitor_resume(mon); + if (hmp->use_readline) { + monitor_resume(mon); + } } qemu_mutex_unlock(&mon->mon_lock); break; @@ -1547,7 +1550,9 @@ static void monitor_event(void *opaque, QEMUChrEvent = event) } else { monitor_flush_locked(mon); } - monitor_suspend(mon); + if (hmp->use_readline) { + monitor_suspend(mon); + } mon->mux_out =3D 1; } qemu_mutex_unlock(&mon->mon_lock); @@ -1558,7 +1563,7 @@ static void monitor_event(void *opaque, QEMUChrEvent = event) "information\n", QEMU_VERSION); qemu_mutex_lock(&mon->mon_lock); mon->reset_seen =3D 1; - if (!mon->mux_out) { + if (!mon->mux_out && hmp->use_readline) { /* Suspend-resume forces the prompt to be printed. */ monitor_suspend(mon); monitor_resume(mon); diff --git a/monitor/monitor.c b/monitor/monitor.c index 9b62716033..f1b189c1c2 100644 --- a/monitor/monitor.c +++ b/monitor/monitor.c @@ -157,25 +157,6 @@ bool monitor_requires_iothread(const Monitor *mon) return cls->requires_iothread && cls->requires_iothread(mon); } =20 -/** - * Is @mon is using readline? - * Note: not all HMP monitors use readline, e.g., gdbserver has a - * non-interactive HMP monitor, so readline is not used there. - */ -static inline bool monitor_uses_readline(const MonitorHMP *mon) -{ - return mon->use_readline; -} - -static inline bool monitor_is_hmp_non_interactive(const Monitor *mon) -{ - if (!object_dynamic_cast(OBJECT(mon), TYPE_MONITOR_HMP)) { - return false; - } - - return !monitor_uses_readline(container_of(mon, MonitorHMP, parent_obj= )); -} - static gboolean monitor_unblocked(void *do_not_use, GIOCondition cond, void *opaque) { @@ -550,12 +531,8 @@ static gboolean qapi_event_throttle_equal(const void *= a, const void *b) return TRUE; } =20 -int monitor_suspend(Monitor *mon) +void monitor_suspend(Monitor *mon) { - if (monitor_is_hmp_non_interactive(mon)) { - return -ENOTTY; - } - qatomic_inc(&mon->suspend_cnt); =20 if (monitor_requires_iothread(mon)) { @@ -567,7 +544,6 @@ int monitor_suspend(Monitor *mon) } =20 trace_monitor_suspend(mon, 1); - return 0; } =20 static void monitor_accept_input(void *opaque) @@ -584,10 +560,6 @@ static void monitor_accept_input(void *opaque) =20 void monitor_resume(Monitor *mon) { - if (monitor_is_hmp_non_interactive(mon)) { - return; - } - if (qatomic_dec_fetch(&mon->suspend_cnt) =3D=3D 0) { AioContext *ctx; =20 --=20 2.55.0