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From 0d9354fe1bef822c515713a3ceb5b619f7eac00c Mon Sep 17 00:00:00 2001
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Message-Id: <0d9354fe1bef822c515713a3ceb5b619f7eac00c@dist-git>
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From: Andrea Bolognani <abologna@redhat.com>
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Date: Wed, 29 Nov 2017 16:23:11 +0100
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Subject: [PATCH] qemu: Remove redundancy in qemuBuildSerialChrDeviceStr()
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Instead duplicating the capability check for each possible target
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model, introduce a small helper that matches the target model with
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the corresponding capability and collapse all existing checks into
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a single one.
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Signed-off-by: Andrea Bolognani <abologna@redhat.com>
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Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
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(cherry picked from commit fa96d3524296e7119acf5ad7b02653f4c062d030)
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https://bugzilla.redhat.com/show_bug.cgi?id=1449265
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https://bugzilla.redhat.com/show_bug.cgi?id=1511421
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https://bugzilla.redhat.com/show_bug.cgi?id=1512929
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https://bugzilla.redhat.com/show_bug.cgi?id=1512934
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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---
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 src/qemu/qemu_command.c | 40 +++++++++++++++++++++++++++++-----------
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 1 file changed, 29 insertions(+), 11 deletions(-)
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diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
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index 7fd2afb1e0..f8d5d317cd 100644
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--- a/src/qemu/qemu_command.c
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+++ b/src/qemu/qemu_command.c
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@@ -9218,6 +9218,25 @@ qemuBuildShmemCommandLine(virLogManagerPtr logManager,
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     return 0;
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 }
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+
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+static virQEMUCapsFlags
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+qemuChrSerialTargetModelToCaps(virDomainChrSerialTargetModel targetModel)
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+{
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+    switch (targetModel) {
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+    case VIR_DOMAIN_CHR_SERIAL_TARGET_MODEL_USB_SERIAL:
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+        return QEMU_CAPS_DEVICE_USB_SERIAL;
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+    case VIR_DOMAIN_CHR_SERIAL_TARGET_MODEL_PCI_SERIAL:
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+        return QEMU_CAPS_DEVICE_PCI_SERIAL;
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+    case VIR_DOMAIN_CHR_SERIAL_TARGET_MODEL_ISA_SERIAL:
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+    case VIR_DOMAIN_CHR_SERIAL_TARGET_MODEL_NONE:
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+    case VIR_DOMAIN_CHR_SERIAL_TARGET_MODEL_LAST:
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+        break;
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+    }
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+
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+    return 0;
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+}
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+
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+
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 static int
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 qemuBuildChrDeviceCommandLine(virCommandPtr cmd,
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                               const virDomainDef *def,
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@@ -10322,6 +10341,7 @@ qemuBuildCommandLine(virQEMUDriverPtr driver,
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     return NULL;
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 }
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+
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 /* This function generates the correct '-device' string for character
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  * devices of each architecture.
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  */
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@@ -10332,6 +10352,7 @@ qemuBuildSerialChrDeviceStr(char **deviceStr,
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                             virQEMUCapsPtr qemuCaps)
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 {
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     virBuffer cmd = VIR_BUFFER_INITIALIZER;
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+    virQEMUCapsFlags caps;
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     if (qemuDomainIsPSeries(def)) {
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         if (serial->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_SERIAL &&
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@@ -10348,9 +10369,14 @@ qemuBuildSerialChrDeviceStr(char **deviceStr,
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     } else {
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         switch ((virDomainChrSerialTargetModel) serial->targetModel) {
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         case VIR_DOMAIN_CHR_SERIAL_TARGET_MODEL_USB_SERIAL:
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-            if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_USB_SERIAL)) {
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-                virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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-                               _("usb-serial is not supported in this QEMU binary"));
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+        case VIR_DOMAIN_CHR_SERIAL_TARGET_MODEL_PCI_SERIAL:
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+
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+            caps = qemuChrSerialTargetModelToCaps(serial->targetModel);
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+
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+            if (caps && !virQEMUCapsGet(qemuCaps, caps)) {
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+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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+                               _("'%s' is not supported in this QEMU binary"),
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+                               virDomainChrSerialTargetModelTypeToString(serial->targetModel));
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                 goto error;
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             }
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             break;
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@@ -10358,14 +10384,6 @@ qemuBuildSerialChrDeviceStr(char **deviceStr,
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         case VIR_DOMAIN_CHR_SERIAL_TARGET_MODEL_ISA_SERIAL:
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             break;
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-        case VIR_DOMAIN_CHR_SERIAL_TARGET_MODEL_PCI_SERIAL:
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-            if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_PCI_SERIAL)) {
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-                virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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-                               _("pci-serial is not supported with this QEMU binary"));
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-                goto error;
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-            }
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-            break;
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-
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         case VIR_DOMAIN_CHR_SERIAL_TARGET_MODEL_NONE:
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         case VIR_DOMAIN_CHR_SERIAL_TARGET_MODEL_LAST:
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             /* Except from _LAST, which is just a guard value and will never
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-- 
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2.15.1
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