[RFC v3 1/2] Add the port allocation logic for isa-serial devices.
Divya Garg
divya.garg at nutanix.com
Mon Jan 10 11:05:03 UTC 2022
This commit takes care of following cases:
-> Check availability of requested ports.
->The total number of requested ports should not be more than
VIR_MAX_ISA_SERIAL_PORTS.
->The ports requested should be less than VIR_MAX_ISA_SERIAL_PORTS.
->VIR_MAX_ISA_SERIAL_PORTS should correspond to MAX_ISA_SERIAL_PORTS
specified in qemu code commit def337ffda34d331404bd7f1a42726b71500df22.
-> Prevent duplicate device assignments to the same port.
-> In case no ports are provided in the XML, this patch scans the list of unused
isa-serial indices to automatically assign available ports for this VM.
---
src/conf/domain_conf.c | 61 ++++++++++++++++---
src/conf/domain_conf.h | 6 ++
...g-console-compat-2-live+console-virtio.xml | 4 +-
.../qemuhotplug-console-compat-2-live.xml | 4 +-
.../serial-tcp-tlsx509-chardev-notls.xml | 2 +-
.../serial-tcp-tlsx509-chardev-verify.xml | 2 +-
.../serial-tcp-tlsx509-chardev.xml | 2 +-
.../serial-tcp-tlsx509-secret-chardev.xml | 2 +-
.../serial-tcp-tlsx509-chardev.xml | 2 +-
9 files changed, 68 insertions(+), 17 deletions(-)
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 5691b8d2d5..e468e98045 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -5330,6 +5330,56 @@ virDomainHostdevDefPostParse(virDomainHostdevDef *dev,
}
+static int
+virDomainChrIsaSerialDefPostParse(virDomainDef *def)
+{
+ size_t i, j;
+ size_t isa_serial_count = 0;
+ bool used_serial_port[VIR_MAX_ISA_SERIAL_PORTS] = {false};
+
+ /* Perform all the required checks. */
+ for (i = 0; i < def->nserials; i++) {
+
+ if (def->serials[i]->targetType !=
+ VIR_DOMAIN_CHR_SERIAL_TARGET_MODEL_ISA_SERIAL)
+ continue;
+
+ if (isa_serial_count++ >= VIR_MAX_ISA_SERIAL_PORTS ||
+ def->serials[i]->target.port >= VIR_MAX_ISA_SERIAL_PORTS) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Maximum supported number of ISA serial ports is '%d'."), VIR_MAX_ISA_SERIAL_PORTS);
+ return -1;
+ }
+
+ if (def->serials[i]->target.port != -1) {
+ if (used_serial_port[def->serials[i]->target.port]) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("target port '%d' already allocated."), def->serials[i]->target.port);
+ return -1;
+ }
+ used_serial_port[def->serials[i]->target.port] = true;
+ }
+ }
+
+ /* Assign the ports to the devices. */
+ for (i = 0; i < def->nserials; i++) {
+
+ if (def->serials[i]->targetType !=
+ VIR_DOMAIN_CHR_SERIAL_TARGET_MODEL_ISA_SERIAL ||
+ def->serials[i]->target.port != -1)
+ continue;
+
+ for (j = 0; j < VIR_MAX_ISA_SERIAL_PORTS; j++) {
+ if (!used_serial_port[j]) {
+ def->serials[i]->target.port = j;
+ used_serial_port[j] = true;
+ break;
+ }
+ }
+ }
+ return 0;
+}
+
static void
virDomainChrDefPostParse(virDomainChrDef *chr,
const virDomainDef *def)
@@ -6197,6 +6247,9 @@ virDomainDefPostParse(virDomainDef *def,
goto cleanup;
}
+ if (virDomainChrIsaSerialDefPostParse(def) < 0)
+ return -1;
+
/* iterate the devices */
ret = virDomainDeviceInfoIterateFlags(def,
virDomainDefPostParseDeviceIterator,
@@ -19929,14 +19982,6 @@ virDomainDefParseXML(xmlXPathContextPtr ctxt,
if (!chr)
return NULL;
- if (chr->target.port == -1) {
- int maxport = -1;
- for (j = 0; j < i; j++) {
- if (def->serials[j]->target.port > maxport)
- maxport = def->serials[j]->target.port;
- }
- chr->target.port = maxport + 1;
- }
def->serials[def->nserials++] = chr;
}
VIR_FREE(nodes);
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 144ba4dd12..a8f41dc8c2 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1187,6 +1187,12 @@ typedef enum {
VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_LAST
} virDomainChrConsoleTargetType;
+/*
+ * The value of VIR_MAX_ISA_SERIAL_PORTS corresponds to MAX_ISA_SERIAL_PORTS
+ * set in qemu code base.
+ */
+#define VIR_MAX_ISA_SERIAL_PORTS 4
+
typedef enum {
VIR_DOMAIN_CHR_SERIAL_TARGET_MODEL_NONE = 0,
VIR_DOMAIN_CHR_SERIAL_TARGET_MODEL_ISA_SERIAL,
diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-console-compat-2-live+console-virtio.xml b/tests/qemuhotplugtestdomains/qemuhotplug-console-compat-2-live+console-virtio.xml
index 5d688e7748..295d75b768 100644
--- a/tests/qemuhotplugtestdomains/qemuhotplug-console-compat-2-live+console-virtio.xml
+++ b/tests/qemuhotplugtestdomains/qemuhotplug-console-compat-2-live+console-virtio.xml
@@ -74,7 +74,7 @@
<alias name='serial0'/>
</serial>
<serial type='pty'>
- <target type='isa-serial' port='0'>
+ <target type='isa-serial' port='1'>
<model name='isa-serial'/>
</target>
<alias name='serial1'/>
@@ -82,7 +82,7 @@
<serial type='tcp'>
<source mode='bind' host='0.0.0.0' service='2445'/>
<protocol type='raw'/>
- <target type='isa-serial' port='1'>
+ <target type='isa-serial' port='2'>
<model name='isa-serial'/>
</target>
<alias name='serial2'/>
diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-console-compat-2-live.xml b/tests/qemuhotplugtestdomains/qemuhotplug-console-compat-2-live.xml
index b916f30412..850ebddf52 100644
--- a/tests/qemuhotplugtestdomains/qemuhotplug-console-compat-2-live.xml
+++ b/tests/qemuhotplugtestdomains/qemuhotplug-console-compat-2-live.xml
@@ -74,7 +74,7 @@
<alias name='serial0'/>
</serial>
<serial type='pty'>
- <target type='isa-serial' port='0'>
+ <target type='isa-serial' port='1'>
<model name='isa-serial'/>
</target>
<alias name='serial1'/>
@@ -82,7 +82,7 @@
<serial type='tcp'>
<source mode='bind' host='0.0.0.0' service='2445'/>
<protocol type='raw'/>
- <target type='isa-serial' port='1'>
+ <target type='isa-serial' port='2'>
<model name='isa-serial'/>
</target>
<alias name='serial2'/>
diff --git a/tests/qemuxml2argvdata/serial-tcp-tlsx509-chardev-notls.xml b/tests/qemuxml2argvdata/serial-tcp-tlsx509-chardev-notls.xml
index 9b0b8b3e73..522f0184d3 100644
--- a/tests/qemuxml2argvdata/serial-tcp-tlsx509-chardev-notls.xml
+++ b/tests/qemuxml2argvdata/serial-tcp-tlsx509-chardev-notls.xml
@@ -37,7 +37,7 @@
<serial type='tcp'>
<source mode='connect' host='127.0.0.1' service='5555' tls='no'/>
<protocol type='raw'/>
- <target type='isa-serial' port='0'>
+ <target type='isa-serial' port='1'>
<model name='isa-serial'/>
</target>
</serial>
diff --git a/tests/qemuxml2argvdata/serial-tcp-tlsx509-chardev-verify.xml b/tests/qemuxml2argvdata/serial-tcp-tlsx509-chardev-verify.xml
index 75c6c7f5f4..d41f5ee03e 100644
--- a/tests/qemuxml2argvdata/serial-tcp-tlsx509-chardev-verify.xml
+++ b/tests/qemuxml2argvdata/serial-tcp-tlsx509-chardev-verify.xml
@@ -29,7 +29,7 @@
<serial type='tcp'>
<source mode='connect' host='127.0.0.1' service='5555'/>
<protocol type='raw'/>
- <target port='0'/>
+ <target port='1'/>
</serial>
<console type='udp'>
<source mode='bind' host='127.0.0.1' service='1111'/>
diff --git a/tests/qemuxml2argvdata/serial-tcp-tlsx509-chardev.xml b/tests/qemuxml2argvdata/serial-tcp-tlsx509-chardev.xml
index 75c6c7f5f4..d41f5ee03e 100644
--- a/tests/qemuxml2argvdata/serial-tcp-tlsx509-chardev.xml
+++ b/tests/qemuxml2argvdata/serial-tcp-tlsx509-chardev.xml
@@ -29,7 +29,7 @@
<serial type='tcp'>
<source mode='connect' host='127.0.0.1' service='5555'/>
<protocol type='raw'/>
- <target port='0'/>
+ <target port='1'/>
</serial>
<console type='udp'>
<source mode='bind' host='127.0.0.1' service='1111'/>
diff --git a/tests/qemuxml2argvdata/serial-tcp-tlsx509-secret-chardev.xml b/tests/qemuxml2argvdata/serial-tcp-tlsx509-secret-chardev.xml
index 670f282b84..2bf954bc9f 100644
--- a/tests/qemuxml2argvdata/serial-tcp-tlsx509-secret-chardev.xml
+++ b/tests/qemuxml2argvdata/serial-tcp-tlsx509-secret-chardev.xml
@@ -34,7 +34,7 @@
<serial type='tcp'>
<source mode='connect' host='127.0.0.1' service='5555'/>
<protocol type='raw'/>
- <target port='0'/>
+ <target port='1'/>
</serial>
<console type='udp'>
<source mode='bind' host='127.0.0.1' service='1111'/>
diff --git a/tests/qemuxml2xmloutdata/serial-tcp-tlsx509-chardev.xml b/tests/qemuxml2xmloutdata/serial-tcp-tlsx509-chardev.xml
index 7fde19f283..de11465233 100644
--- a/tests/qemuxml2xmloutdata/serial-tcp-tlsx509-chardev.xml
+++ b/tests/qemuxml2xmloutdata/serial-tcp-tlsx509-chardev.xml
@@ -37,7 +37,7 @@
<serial type='tcp'>
<source mode='connect' host='127.0.0.1' service='5555'/>
<protocol type='raw'/>
- <target type='isa-serial' port='0'>
+ <target type='isa-serial' port='1'>
<model name='isa-serial'/>
</target>
</serial>
--
2.25.1
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