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Generate unique socket file

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It's possible to have more than one unnamed virtio-serial unix channel.
We need to generate a unique name for each channel. Currently, we use
".../unknown.sock" for all of them. Better practice would be to specify
an explicit target path name; however, in the absence of that, we need
uniqueness in the names we generate internally.

Before the changes we'd get /var/lib/libvirt/qemu/channel/target/unknown.sock
for each instance of
    <channel type='unix'>
        <source mode='bind'/>
        <target type='virtio'/>
    </channel>

Now, we get vioser-00-00-01.sock, vioser-00-00-02.sock, etc.

Signed-off-by: Scott Garfinkle <seg@us.ibm.com>
This commit is contained in:
Scott Garfinkle
2017-07-25 09:33:50 -05:00
committed by Martin Kletzander
parent eaf2c9f891
commit a7bc2c8cfd
2 changed files with 18 additions and 8 deletions
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24
src/qemu/qemu_domain.c
View File

@@ -7254,18 +7254,28 @@ int
qemuDomainPrepareChannel(virDomainChrDefPtr channel,
const char *domainChannelTargetDir)
{
if (channel->targetType == VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO &&
channel->source->type == VIR_DOMAIN_CHR_TYPE_UNIX &&
!channel->source->data.nix.path) {
if (channel->targetType != VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO ||
channel->source->type != VIR_DOMAIN_CHR_TYPE_UNIX ||
channel->source->data.nix.path)
return 0;
if (channel->target.name) {
if (virAsprintf(&channel->source->data.nix.path,
"%s/%s", domainChannelTargetDir,
channel->target.name ? channel->target.name
: "unknown.sock") < 0)
channel->target.name) < 0)
return -1;
} else { // Generate a unique name
if (virAsprintf(&channel->source->data.nix.path,
"%s/vioser-%02d-%02d-%02d.sock",
domainChannelTargetDir,
channel->info.addr.vioserial.controller,
channel->info.addr.vioserial.bus,
channel->info.addr.vioserial.port) < 0)
return -1;
channel->source->data.nix.listen = true;
}
channel->source->data.nix.listen = true;
return 0;
}

2
tests/qemuxml2argvdata/qemuxml2argv-channel-virtio-unix.args
View File

@@ -29,7 +29,7 @@ path=/tmp/channel/domain--1-QEMUGuest1/org.qemu.guest_agent.0,server,nowait \
-device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,\
id=channel0,name=org.qemu.guest_agent.0 \
-chardev socket,id=charchannel1,\
path=/tmp/channel/domain--1-QEMUGuest1/unknown.sock,server,nowait \
path=/tmp/channel/domain--1-QEMUGuest1/vioser-00-00-02.sock,server,nowait \
-device virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel1,\
id=channel1 \
-chardev socket,id=charchannel2,path=/tmp/channel/domain--1-QEMUGuest1/ble,\