[libvirt] [PATCH v2] Generate unique socket file
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.
Changes from v1: new socket name
Signed-off-by: Scott Garfinkle <seg(a)us.ibm.com>
---
src/qemu/qemu_domain.c | 24 +++++++++++++++-------
.../qemuxml2argv-channel-virtio-unix.args | 2 +-
2 files changed, 18 insertions(+), 8 deletions(-)
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 78e75f1..7a9958d 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -7178,18 +7178,28 @@ 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;
}
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-channel-virtio-unix.args
b/tests/qemuxml2argvdata/qemuxml2argv-channel-virtio-unix.args
index 2b72965..8e0452a 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-channel-virtio-unix.args
+++ b/tests/qemuxml2argvdata/qemuxml2argv-channel-virtio-unix.args
@@ -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,\
--
1.8.3.1