[RFC v3 1/2] Add the port allocation logic for isa-serial devices.
Ani Sinha
ani at anisinha.ca
Tue Jan 11 10:39:06 UTC 2022
Please add SOB.
On Mon, 10 Jan 2022, Divya Garg wrote:
> 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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