[libvirt] [PATCH 10/12] qemu-command: Move and rename qemuOpenVhostNet
John Ferlan
jferlan at redhat.com
Mon Feb 15 19:37:24 UTC 2016
Move function to qemu_interface.c and rename to qemuInterfaceOpenVhostNet
Signed-off-by: John Ferlan <jferlan at redhat.com>
---
src/qemu/qemu_command.c | 97 +----------------------------------------------
src/qemu/qemu_command.h | 6 ---
src/qemu/qemu_hotplug.c | 9 +++--
src/qemu/qemu_interface.c | 97 +++++++++++++++++++++++++++++++++++++++++++++++
src/qemu/qemu_interface.h | 7 ++++
5 files changed, 112 insertions(+), 104 deletions(-)
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index a37dba6..60dac2f 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -257,100 +257,6 @@ qemuBuildObjectCommandlineFromJSON(const char *type,
}
-/**
- * qemuOpenVhostNet:
- * @def: domain definition
- * @net: network definition
- * @qemuCaps: qemu binary capabilities
- * @vhostfd: array of opened vhost-net device
- * @vhostfdSize: number of file descriptors in @vhostfd array
- *
- * Open vhost-net, multiple times - if requested.
- * In case, no vhost-net is needed, @vhostfdSize is set to 0
- * and 0 is returned.
- *
- * Returns: 0 on success
- * -1 on failure
- */
-int
-qemuOpenVhostNet(virDomainDefPtr def,
- virDomainNetDefPtr net,
- virQEMUCapsPtr qemuCaps,
- int *vhostfd,
- size_t *vhostfdSize)
-{
- size_t i;
- const char *vhostnet_path = net->backend.vhost;
-
- if (!vhostnet_path)
- vhostnet_path = "/dev/vhost-net";
-
- /* If running a plain QEMU guest, or
- * if the config says explicitly to not use vhost, return now*/
- if (def->virtType != VIR_DOMAIN_VIRT_KVM ||
- net->driver.virtio.name == VIR_DOMAIN_NET_BACKEND_TYPE_QEMU) {
- *vhostfdSize = 0;
- return 0;
- }
-
- /* If qemu doesn't support vhost-net mode (including the -netdev command
- * option), don't try to open the device.
- */
- if (!(virQEMUCapsGet(qemuCaps, QEMU_CAPS_VHOST_NET) &&
- qemuDomainSupportsNetdev(def, qemuCaps, net))) {
- if (net->driver.virtio.name == VIR_DOMAIN_NET_BACKEND_TYPE_VHOST) {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
- "%s", _("vhost-net is not supported with "
- "this QEMU binary"));
- return -1;
- }
- *vhostfdSize = 0;
- return 0;
- }
-
- /* If the nic model isn't virtio, don't try to open. */
- if (!(net->model && STREQ(net->model, "virtio"))) {
- if (net->driver.virtio.name == VIR_DOMAIN_NET_BACKEND_TYPE_VHOST) {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
- "%s", _("vhost-net is only supported for "
- "virtio network interfaces"));
- return -1;
- }
- *vhostfdSize = 0;
- return 0;
- }
-
- for (i = 0; i < *vhostfdSize; i++) {
- vhostfd[i] = open(vhostnet_path, O_RDWR);
-
- /* If the config says explicitly to use vhost and we couldn't open it,
- * report an error.
- */
- if (vhostfd[i] < 0) {
- virDomainAuditNetDevice(def, net, vhostnet_path, false);
- if (net->driver.virtio.name == VIR_DOMAIN_NET_BACKEND_TYPE_VHOST) {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
- "%s", _("vhost-net was requested for an interface, "
- "but is unavailable"));
- goto error;
- }
- VIR_WARN("Unable to open vhost-net. Opened so far %zu, requested %zu",
- i, *vhostfdSize);
- *vhostfdSize = i;
- break;
- }
- }
- virDomainAuditNetDevice(def, net, vhostnet_path, *vhostfdSize);
- return 0;
-
- error:
- while (i--)
- VIR_FORCE_CLOSE(vhostfd[i]);
-
- return -1;
-}
-
-
int
qemuNetworkPrepareDevices(virDomainDefPtr def)
{
@@ -6672,7 +6578,8 @@ qemuBuildInterfaceCommandLine(virCommandPtr cmd,
memset(vhostfd, -1, vhostfdSize * sizeof(vhostfd[0]));
- if (qemuOpenVhostNet(def, net, qemuCaps, vhostfd, &vhostfdSize) < 0)
+ if (qemuInterfaceOpenVhostNet(def, net, qemuCaps,
+ vhostfd, &vhostfdSize) < 0)
goto cleanup;
}
diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h
index 7ed0ad5..61a0212 100644
--- a/src/qemu/qemu_command.h
+++ b/src/qemu/qemu_command.h
@@ -224,12 +224,6 @@ char *qemuBuildRedirdevDevStr(virDomainDefPtr def,
virDomainRedirdevDefPtr dev,
virQEMUCapsPtr qemuCaps);
-int qemuOpenVhostNet(virDomainDefPtr def,
- virDomainNetDefPtr net,
- virQEMUCapsPtr qemuCaps,
- int *vhostfd,
- size_t *vhostfdSize);
-
int qemuNetworkPrepareDevices(virDomainDefPtr def);
int qemuAssignDeviceAliases(virDomainDefPtr def, virQEMUCapsPtr qemuCaps);
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index e635fab..71cfc79 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -926,7 +926,8 @@ int qemuDomainAttachNetDevice(virConnectPtr conn,
tapfd, &tapfdSize) < 0)
goto cleanup;
iface_connected = true;
- if (qemuOpenVhostNet(vm->def, net, priv->qemuCaps, vhostfd, &vhostfdSize) < 0)
+ if (qemuInterfaceOpenVhostNet(vm->def, net, priv->qemuCaps,
+ vhostfd, &vhostfdSize) < 0)
goto cleanup;
} else if (actualType == VIR_DOMAIN_NET_TYPE_DIRECT) {
tapfdSize = vhostfdSize = net->driver.virtio.queues;
@@ -943,14 +944,16 @@ int qemuDomainAttachNetDevice(virConnectPtr conn,
VIR_NETDEV_VPORT_PROFILE_OP_CREATE) < 0)
goto cleanup;
iface_connected = true;
- if (qemuOpenVhostNet(vm->def, net, priv->qemuCaps, vhostfd, &vhostfdSize) < 0)
+ if (qemuInterfaceOpenVhostNet(vm->def, net, priv->qemuCaps,
+ vhostfd, &vhostfdSize) < 0)
goto cleanup;
} else if (actualType == VIR_DOMAIN_NET_TYPE_ETHERNET) {
vhostfdSize = 1;
if (VIR_ALLOC(vhostfd) < 0)
goto cleanup;
*vhostfd = -1;
- if (qemuOpenVhostNet(vm->def, net, priv->qemuCaps, vhostfd, &vhostfdSize) < 0)
+ if (qemuInterfaceOpenVhostNet(vm->def, net, priv->qemuCaps,
+ vhostfd, &vhostfdSize) < 0)
goto cleanup;
}
diff --git a/src/qemu/qemu_interface.c b/src/qemu/qemu_interface.c
index 2584236..79507af 100644
--- a/src/qemu/qemu_interface.c
+++ b/src/qemu/qemu_interface.c
@@ -38,6 +38,9 @@
#include "virnetdevbridge.h"
#include "virnetdevvportprofile.h"
+#include <sys/stat.h>
+#include <fcntl.h>
+
#define VIR_FROM_THIS VIR_FROM_QEMU
VIR_LOG_INIT("qemu.qemu_interface");
@@ -500,3 +503,97 @@ qemuInterfaceNetworkConnect(virDomainDefPtr def,
return ret;
}
+
+
+/**
+ * qemuInterfaceOpenVhostNet:
+ * @def: domain definition
+ * @net: network definition
+ * @qemuCaps: qemu binary capabilities
+ * @vhostfd: array of opened vhost-net device
+ * @vhostfdSize: number of file descriptors in @vhostfd array
+ *
+ * Open vhost-net, multiple times - if requested.
+ * In case, no vhost-net is needed, @vhostfdSize is set to 0
+ * and 0 is returned.
+ *
+ * Returns: 0 on success
+ * -1 on failure
+ */
+int
+qemuInterfaceOpenVhostNet(virDomainDefPtr def,
+ virDomainNetDefPtr net,
+ virQEMUCapsPtr qemuCaps,
+ int *vhostfd,
+ size_t *vhostfdSize)
+{
+ size_t i;
+ const char *vhostnet_path = net->backend.vhost;
+
+ if (!vhostnet_path)
+ vhostnet_path = "/dev/vhost-net";
+
+ /* If running a plain QEMU guest, or
+ * if the config says explicitly to not use vhost, return now*/
+ if (def->virtType != VIR_DOMAIN_VIRT_KVM ||
+ net->driver.virtio.name == VIR_DOMAIN_NET_BACKEND_TYPE_QEMU) {
+ *vhostfdSize = 0;
+ return 0;
+ }
+
+ /* If qemu doesn't support vhost-net mode (including the -netdev command
+ * option), don't try to open the device.
+ */
+ if (!(virQEMUCapsGet(qemuCaps, QEMU_CAPS_VHOST_NET) &&
+ qemuDomainSupportsNetdev(def, qemuCaps, net))) {
+ if (net->driver.virtio.name == VIR_DOMAIN_NET_BACKEND_TYPE_VHOST) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ "%s", _("vhost-net is not supported with "
+ "this QEMU binary"));
+ return -1;
+ }
+ *vhostfdSize = 0;
+ return 0;
+ }
+
+ /* If the nic model isn't virtio, don't try to open. */
+ if (!(net->model && STREQ(net->model, "virtio"))) {
+ if (net->driver.virtio.name == VIR_DOMAIN_NET_BACKEND_TYPE_VHOST) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ "%s", _("vhost-net is only supported for "
+ "virtio network interfaces"));
+ return -1;
+ }
+ *vhostfdSize = 0;
+ return 0;
+ }
+
+ for (i = 0; i < *vhostfdSize; i++) {
+ vhostfd[i] = open(vhostnet_path, O_RDWR);
+
+ /* If the config says explicitly to use vhost and we couldn't open it,
+ * report an error.
+ */
+ if (vhostfd[i] < 0) {
+ virDomainAuditNetDevice(def, net, vhostnet_path, false);
+ if (net->driver.virtio.name == VIR_DOMAIN_NET_BACKEND_TYPE_VHOST) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ "%s", _("vhost-net was requested for an interface, "
+ "but is unavailable"));
+ goto error;
+ }
+ VIR_WARN("Unable to open vhost-net. Opened so far %zu, requested %zu",
+ i, *vhostfdSize);
+ *vhostfdSize = i;
+ break;
+ }
+ }
+ virDomainAuditNetDevice(def, net, vhostnet_path, *vhostfdSize);
+ return 0;
+
+ error:
+ while (i--)
+ VIR_FORCE_CLOSE(vhostfd[i]);
+
+ return -1;
+}
diff --git a/src/qemu/qemu_interface.h b/src/qemu/qemu_interface.h
index 9cc7331..8207e9f 100644
--- a/src/qemu/qemu_interface.h
+++ b/src/qemu/qemu_interface.h
@@ -27,6 +27,7 @@
# include "domain_conf.h"
# include "qemu_conf.h"
+# include "qemu_domain.h"
int qemuInterfaceStartDevice(virDomainNetDefPtr net);
int qemuInterfaceStartDevices(virDomainDefPtr def);
@@ -46,4 +47,10 @@ int qemuInterfaceNetworkConnect(virDomainDefPtr def,
int *tapfd,
size_t *tapfdSize)
ATTRIBUTE_NONNULL(2);
+
+int qemuInterfaceOpenVhostNet(virDomainDefPtr def,
+ virDomainNetDefPtr net,
+ virQEMUCapsPtr qemuCaps,
+ int *vhostfd,
+ size_t *vhostfdSize);
#endif /* __QEMU_INTERFACE_H__ */
--
2.5.0
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