On Thu, Sep 14, 2017 at 08:51:56 -0400, John Ferlan wrote: > From: Ashish Mittal <[email protected]> > > Alter qemu command line generation in order to possibly add TLS for > a suitably configured domain. > > Sample TLS args generated by libvirt - > > -object tls-creds-x509,id=objvirtio-disk0_tls0,dir=/etc/pki/qemu,\ > endpoint=client,verify-peer=yes \ > -drive file.driver=vxhs,file.tls-creds=objvirtio-disk0_tls0,\ > file.vdisk-id=eb90327c-8302-4725-9e1b-4e85ed4dc251,\ > file.server.type=tcp,file.server.host=192.168.0.1,\ > file.server.port=9999,format=raw,if=none,\ > id=drive-virtio-disk0,cache=none \ > -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,\ > id=virtio-disk0 > > Update the qemuxml2argvtest with a couple of examples. One for a > simple case and the other a bit more complex where multiple VxHS disks > are added where at least one uses a VxHS that doesn't require TLS > credentials and thus sets the domain disk source attribute "tls = 'no'". > > Update the hotplug to be able to handle processing the tlsAlias whether > it's to add the TLS object when hotplugging a disk or to remove the TLS > object when hot unplugging a disk. The hot plug/unplug code is largely > generic, but the addition code does make the VXHS specific checks only > because it needs to grab the correct config directory and generate the > object as the command line would do. > > Signed-off-by: Ashish Mittal <[email protected]> > Signed-off-by: John Ferlan <[email protected]> > --- > src/qemu/qemu_block.c | 8 +++ > src/qemu/qemu_command.c | 29 +++++++++ > src/qemu/qemu_hotplug.c | 73 > ++++++++++++++++++++++ > ...-disk-drive-network-tlsx509-multidisk-vxhs.args | 43 +++++++++++++ > ...v-disk-drive-network-tlsx509-multidisk-vxhs.xml | 50 +++++++++++++++ > ...muxml2argv-disk-drive-network-tlsx509-vxhs.args | 30 +++++++++ > tests/qemuxml2argvtest.c | 7 +++ > 7 files changed, 240 insertions(+) > create mode 100644 > tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-tlsx509-multidisk-vxhs.args > create mode 100644 > tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-tlsx509-multidisk-vxhs.xml > create mode 100644 > tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-tlsx509-vxhs.args > > diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c > index ca6e213b4..458b90d8e 100644 > --- a/src/qemu/qemu_block.c > +++ b/src/qemu/qemu_block.c > @@ -529,16 +529,24 @@ qemuBlockStorageSourceGetVxHSProps(virStorageSourcePtr > src) > return NULL; > } > > + if (src->haveTLS == VIR_TRISTATE_BOOL_YES && !src->tlsAlias) { > + virReportError(VIR_ERR_INVALID_ARG, "%s", > + _("VxHS disk does not have TLS alias set")); > + return NULL; > + } > + > if (!(server = qemuBlockStorageSourceBuildJSONSocketAddress(src->hosts, > true))) > return NULL; > > /* VxHS disk specification example: > * { driver:"vxhs", > + * [tls-creds:"objvirtio-disk0_tls0",]
Be careful with square brackets in JSON, they denote an array.
> * vdisk-id:"eb90327c-8302-4725-4e85ed4dc251",
> * server:[{type:"tcp", host:"1.2.3.4", port:9999}]}
> */
> if (virJSONValueObjectCreate(&ret,
> "s:driver", protocol,
> + "S:tls-creds", src->tlsAlias,
> "s:vdisk-id", src->path,
> "a:server", server, NULL) < 0)
> virJSONValueFree(server);
> diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
> index 0a3278510..7b98e1947 100644
> --- a/src/qemu/qemu_command.c
> +++ b/src/qemu/qemu_command.c
> @@ -794,6 +794,32 @@ qemuBuildTLSx509CommandLine(virCommandPtr cmd,
> }
>
>
> +/* qemuBuildDiskTLSx509CommandLine:
> + *
> + * Add TLS object if the disk uses a secure communication channel
> + *
> + * Returns 0 on success, -1 w/ error on some sort of failure.
> + */
> +static int
> +qemuBuildDiskTLSx509CommandLine(virCommandPtr cmd,
> + virQEMUDriverConfigPtr cfg,
> + virDomainDiskDefPtr disk,
> + virQEMUCapsPtr qemuCaps)
> +{
> + virStorageSourcePtr src = disk->src;
> +
> + /* other protocols may be added later */
> + if (src->protocol == VIR_STORAGE_NET_PROTOCOL_VXHS &&
> + disk->src->haveTLS == VIR_TRISTATE_BOOL_YES) {
> + return qemuBuildTLSx509CommandLine(cmd, cfg->vxhsTLSx509certdir,
> + false, true, false,
> + disk->info.alias, qemuCaps);
> + }
> +
> + return 0;
> +}
> +
> +
> static char *
> qemuBuildNetworkDriveURI(virStorageSourcePtr src,
> qemuDomainSecretInfoPtr secinfo)
[...]
> diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
> index b365078ec..e4174af35 100644
> --- a/src/qemu/qemu_hotplug.c
> +++ b/src/qemu/qemu_hotplug.c
> @@ -152,6 +152,55 @@ qemuDomainPrepareDisk(virQEMUDriverPtr driver,
>
>
> static int
> +qemuDomainAddDiskTLSObject(virQEMUDriverPtr driver,
> + virDomainObjPtr vm,
> + virDomainDiskDefPtr disk,
> + char **tlsAlias)
I don't particularly like this. You set it into the disk object, so
there should be a function which rolls this back for a disk (or
preferably a virStorageSource).
> +{
> + int ret = -1;
> + virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
> + qemuDomainObjPrivatePtr priv = vm->privateData;
> + virStorageSourcePtr src = disk->src;
> + virJSONValuePtr tlsProps = NULL;
> +
> + /* NB: This may alter haveTLS based on cfg */
> + qemuDomainPrepareDiskSourceTLS(src, disk->info.alias, cfg);
This should be executed in the hotplug API function and not in a helper.
> +
> + if (src->haveTLS != VIR_TRISTATE_BOOL_YES) {
> + ret = 0;
> + goto cleanup;
> + }
> +
> + /* Initial implementation doesn't require/use a secret to decrypt
> + * a server certificate, so there's no need to manage a tlsSecAlias
> + * and tlsSecProps. See qemuDomainAddChardevTLSObjects for the
> + * methodology required to add a secret object. */
> +
> + /* For a VxHS environment, create a TLS object for the client to
> + * connect to the VxHS server. */
> + if (src->type == VIR_STORAGE_TYPE_NETWORK &&
> + src->protocol == VIR_STORAGE_NET_PROTOCOL_VXHS &&
> + qemuDomainGetTLSObjects(priv->qemuCaps, NULL,
> + cfg->vxhsTLSx509certdir, false, true,
> + disk->info.alias, &tlsProps, tlsAlias,
> + NULL, NULL) < 0)
This looks like another place that extracts qemu-specific stuff, which
need to be duplicated for blockdev add. Can't we make the cert dir part
of virStorageSource?
> + goto cleanup;
> +
> + if (qemuDomainAddTLSObjects(driver, vm, QEMU_ASYNC_JOB_NONE,
> + NULL, NULL, *tlsAlias, &tlsProps) < 0)
> + goto cleanup;
> +
> + ret = 0;
> +
> + cleanup:
> + virJSONValueFree(tlsProps);
> + virObjectUnref(cfg);
> +
> + return ret;
> +}
> +
> +
> +static int
> qemuHotplugWaitForTrayEject(virQEMUDriverPtr driver,
> virDomainObjPtr vm,
> virDomainDiskDefPtr disk,
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