[libvirt] 答复： Re: [PATCH] libxl: support assignment from a pool of SRIOV VFs

>> Jim Fehlig <jfehlig(a)suse.com&gt; 2016-2-20 上午 7:30 >>>

Add codes to support creating domain with network defition of assigning SRIOV VF from a pool. And fix hot plug and unplug SRIOV VF under this kind of network defition. Signed-off-by: Chunyan Liu <cyliu(a)suse.com&gt; --- src/libxl/libxl_conf.c | 5 +++-- src/libxl/libxl_domain.c | 48 +++++++++++++++++++++++++++++++++++++++++++++++- src/libxl/libxl_driver.c | 12 ++++++++++++ tests/Makefile.am | 3 +++ 4 files changed, 65 insertions(+), 3 deletions(-) diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c index 6320421..f50c68a 100644 --- a/src/libxl/libxl_conf.c +++ b/src/libxl/libxl_conf.c @@ -1260,7 +1260,8 @@ libxlMakeNicList(virDomainDefPtr def, libxl_domain_config *d_config) return -1; for (i = 0; i < nnics; i++) { - if (l_nics[i]->type == VIR_DOMAIN_NET_TYPE_HOSTDEV) + if (l_nics[i]->type == VIR_DOMAIN_NET_TYPE_HOSTDEV || + l_nics[i]->data.network.actual->type == VIR_DOMAIN_NET_TYPE_HOSTDEV)

Elsewhere we use the virDomainNetGetActualType() accessor function.

continue; if (libxlMakeNic(def, l_nics[i], &x_nics[nvnics])) @@ -1278,7 +1279,7 @@ libxlMakeNicList(virDomainDefPtr def, libxl_domain_config *d_config) VIR_SHRINK_N(x_nics, nnics, nnics - nvnics); d_config->nics = x_nics; - d_config->num_nics = nnics; + d_config->num_nics = nvnics;

This looks like a bug fix. If so, it should be in a separate patch.

return 0; diff --git a/src/libxl/libxl_domain.c b/src/libxl/libxl_domain.c index cf5c9f6..9bf7a5a 100644 --- a/src/libxl/libxl_domain.c +++ b/src/libxl/libxl_domain.c @@ -35,6 +35,7 @@ #include "virstring.h" #include "virtime.h" #include "locking/domain_lock.h" +#include "network/bridge_driver.h" #define VIR_FROM_THIS VIR_FROM_LIBXL @@ -314,7 +315,7 @@ libxlDomainDeviceDefPostParse(virDomainDeviceDefPtr dev, virDomainHostdevSubsysPCIPtr pcisrc; if (dev->type == VIR_DOMAIN_DEVICE_NET) - hostdev = &(dev->data.net)->data.hostdev.def; + hostdev = &dev->data.net->data.hostdev.def;

This looks like a bug fix too.

else hostdev = dev->data.hostdev; pcisrc = &hostdev->source.subsys.u.pci; @@ -916,6 +917,48 @@ libxlConsoleCallback(libxl_ctx *ctx, libxl_event *ev, void *for_callback) libxl_event_free(ctx, ev); } +static int +libxlNetworkPrepareDevices(virDomainDefPtr def) +{ + int ret = -1; + size_t i; + + for (i = 0; i < def->nnets; i++) { + virDomainNetDefPtr net = def->nets[i]; + int actualType; + + /* If appropriate, grab a physical device from the configured + * network's pool of devices, or resolve bridge device name + * to the one defined in the network definition. + */ + if (networkAllocateActualDevice(def, net) < 0) + goto cleanup; + + actualType = virDomainNetGetActualType(net); + if (actualType == VIR_DOMAIN_NET_TYPE_HOSTDEV && + net->type == VIR_DOMAIN_NET_TYPE_NETWORK) { + /* Each type='hostdev' network device must also have a + * corresponding entry in the hostdevs array. For netdevs + * that are hardcoded as type='hostdev', this is already + * done by the parser, but for those allocated from a + * network / determined at runtime, we need to do it + * separately. + */ + virDomainHostdevDefPtr hostdev = virDomainNetGetActualHostdev(net); + virDomainHostdevSubsysPCIPtr pcisrc = &hostdev->source.subsys.u.pci; +

I n > see if the hostdev is already in use. Is that needed here too?

+ if (hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS && + hostdev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI)

Does this need to include checking if backend is already set (pcisrc->backend == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_DEFAULT) ? I suppose it should always be VIR_DOMAIN_HOSTDEV_PCI_BACKEND_XEN.

+ pcisrc->backend = VIR_DOMAIN_HOSTDEV_PCI_BACKEND_XEN; + + if (virDomainHostdevInsert(def, hostdev) < 0) + goto cleanup; + } + } + ret = 0; + cleanup: + return ret; +}

Does anything done by this function need to be undone when the domain is shutdown?

Regards, Jim