[libvirt] [PATCH 08/19] qemu: Change protocol parameter for secret setup

[Peter Krempa]

On Mon, Jun 13, 2016 at 20:27:47 -0400, John Ferlan wrote:
> Rather than assume/pass the protocol to the qemuDomainSecretPlainSetup
> and qemuDomainSecretAESSetup, determine and pass the secretUsageType
> which is then used in the virSecretGetSecretString call
> 
> For the two callers that convert from virStorageNetProtocol, add
> a new helper qemuDomainSecretProtocolGetUsageType.
> 
> Signed-off-by: John Ferlan <jferlan at redhat.com>
> ---
>  src/qemu/qemu_domain.c | 105 +++++++++++++++++++++++++++++--------------------
>  1 file changed, 63 insertions(+), 42 deletions(-)
> 
> diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
> index 34e3d95..52cbc72 100644
> --- a/src/qemu/qemu_domain.c
> +++ b/src/qemu/qemu_domain.c

[...]

> +/* qemuDomainSecretGetProtocolUsageType:
> + * @protocol: The virStorageNetProtocol protocol type
> + *
> + * Convert the protocl into the expected virSecretUsageType for
> + * eventual usage to fetch the secret
> + *
> + * Returns matched protocol type or VIR_SECRET_USAGE_TYPE_NONE with an
> + * error message set on failure.
> + */
> +static virSecretUsageType
> +qemuDomainSecretProtocolGetUsageType(virStorageNetProtocol protocol)
> +{
> +    switch ((virStorageNetProtocol)protocol) {
> +    case VIR_STORAGE_NET_PROTOCOL_RBD:
> +        return VIR_SECRET_USAGE_TYPE_CEPH;
> +
> +    case VIR_STORAGE_NET_PROTOCOL_ISCSI:
> +        return VIR_SECRET_USAGE_TYPE_ISCSI;
> +
> +    case VIR_STORAGE_NET_PROTOCOL_NONE:
> +    case VIR_STORAGE_NET_PROTOCOL_NBD:
> +    case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
> +    case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
> +    case VIR_STORAGE_NET_PROTOCOL_HTTP:
> +    case VIR_STORAGE_NET_PROTOCOL_HTTPS:
> +    case VIR_STORAGE_NET_PROTOCOL_FTP:
> +    case VIR_STORAGE_NET_PROTOCOL_FTPS:
> +    case VIR_STORAGE_NET_PROTOCOL_TFTP:
> +    case VIR_STORAGE_NET_PROTOCOL_LAST:
> +        virReportError(VIR_ERR_INTERNAL_ERROR,
> +                       _("protocol '%s' cannot be used for encrypted secrets"),
> +                       virStorageNetProtocolTypeToString(protocol));

You could change this error message so that it actually makes some
sense. The protocols above don't support any form of authentication at
least in context of our interaction with qemu, not only specifically
encrypted secrets.

> +    }
> +    return VIR_SECRET_USAGE_TYPE_NONE;
> +}
> +
> +
>  /* qemuDomainSecretDiskPrepare:
>   * @conn: Pointer to connection
>   * @priv: pointer to domain private object
> @@ -1008,13 +1018,19 @@ qemuDomainSecretDiskPrepare(virConnectPtr conn,
>          (src->protocol == VIR_STORAGE_NET_PROTOCOL_ISCSI ||
>           src->protocol == VIR_STORAGE_NET_PROTOCOL_RBD)) {
>  
> +        virSecretUsageType secretUsageType;
>          qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
>  
>          if (VIR_ALLOC(secinfo) < 0)
>              return -1;
>  
> +        if ((secretUsageType =
> +             qemuDomainSecretProtocolGetUsageType(src->protocol)) ==
> +            VIR_SECRET_USAGE_TYPE_NONE)

Dead code. The condition above guarantees that this doesn't ever return
_NONE. I think you could set the usage type here rather than having an
extra helper that doesn't do much else.

> +            goto error;
> +
>          if (qemuDomainSecretSetup(conn, priv, secinfo, disk->info.alias,
> -                                  src->protocol, src->auth) < 0)
> +                                  secretUsageType, src->auth) < 0)
>              goto error;
>  
>          diskPriv->secinfo = secinfo;
> @@ -1072,14 +1088,19 @@ qemuDomainSecretHostdevPrepare(virConnectPtr conn,
>          if (scsisrc->protocol == VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_ISCSI &&
>              iscsisrc->auth) {
>  
> +            virSecretUsageType secretUsageType;
>              qemuDomainHostdevPrivatePtr hostdevPriv =
>                  QEMU_DOMAIN_HOSTDEV_PRIVATE(hostdev);
>  
>              if (VIR_ALLOC(secinfo) < 0)
>                  return -1;
>  
> +            if ((secretUsageType =
> +                 qemuDomainSecretProtocolGetUsageType(VIR_STORAGE_NET_PROTOCOL_ISCSI)) == VIR_SECRET_USAGE_TYPE_NONE)

Same complaint.

> +                goto error;
> +