[libvirt] [PATCHv2 12/14] lib: Add API to modify vCPU state from the guest using the guest agent
Peter Krempa
pkrempa at redhat.com
Wed Jun 5 13:44:03 UTC 2013
This patch introduces API virDomainSetGuestVcpus that will be used to
work with vCPU state from the point of view of the guest using the guest
agent.
---
include/libvirt/libvirt.h.in | 4 ++++
src/driver.h | 8 +++++++
src/libvirt.c | 55 ++++++++++++++++++++++++++++++++++++++++++++
src/libvirt_public.syms | 1 +
src/remote/remote_driver.c | 1 +
src/remote/remote_protocol.x | 15 +++++++++++-
src/remote_protocol-structs | 7 ++++++
7 files changed, 90 insertions(+), 1 deletion(-)
diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
index c8f639a..2dccc68 100644
--- a/include/libvirt/libvirt.h.in
+++ b/include/libvirt/libvirt.h.in
@@ -2128,6 +2128,10 @@ int virDomainSetVcpus (virDomainPtr domain,
int virDomainSetVcpusFlags (virDomainPtr domain,
unsigned int nvcpus,
unsigned int flags);
+int virDomainSetGuestVcpu (virDomainPtr domain,
+ unsigned int id,
+ unsigned int online,
+ unsigned int flags);
int virDomainGetVcpusFlags (virDomainPtr domain,
unsigned int flags);
diff --git a/src/driver.h b/src/driver.h
index cbafdce..301e490 100644
--- a/src/driver.h
+++ b/src/driver.h
@@ -1050,6 +1050,13 @@ typedef int
unsigned char **cpumap,
unsigned int flags);
+typedef int
+(*virDrvDomainSetGuestVcpu)(virDomainPtr dom,
+ unsigned int id,
+ unsigned int online,
+ unsigned int flags);
+
+
typedef struct _virDriver virDriver;
typedef virDriver *virDriverPtr;
@@ -1252,6 +1259,7 @@ struct _virDriver {
virDrvDomainSendProcessSignal domainSendProcessSignal;
virDrvDomainLxcOpenNamespace domainLxcOpenNamespace;
virDrvDomainGetVCPUMap domainGetVCPUMap;
+ virDrvDomainSetGuestVcpu domainSetGuestVcpu;
};
diff --git a/src/libvirt.c b/src/libvirt.c
index 59e02a1..9dd6b97 100644
--- a/src/libvirt.c
+++ b/src/libvirt.c
@@ -8969,6 +8969,61 @@ error:
return -1;
}
+
+/**
+ * virDomainSetGuestVcpu:
+ * @domain: pointer to domain object, or NULL for Domain0
+ * @id: vcpu ID in the guest
+ * @online: desired state of the vcpu
+ * @flags: currently unused, callers should pass 0
+ *
+ * Dynamically change the state of a virtual CPUs used by the domain by
+ * using the guest agent. The vCPU id used is from the point of view of
+ * the guest.
+ *
+ * Returns 0 in case of success, -1 in case of failure.
+ */
+
+int
+virDomainSetGuestVcpu(virDomainPtr domain,
+ unsigned int id,
+ unsigned int online,
+ unsigned int flags)
+{
+ virConnectPtr conn;
+
+ VIR_DOMAIN_DEBUG(domain, "id=%u, online=%u, flags=%x", id, online, flags);
+
+ virResetLastError();
+
+ if (!VIR_IS_CONNECTED_DOMAIN(domain)) {
+ virLibDomainError(VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
+ virDispatchError(NULL);
+ return -1;
+ }
+ if (domain->conn->flags & VIR_CONNECT_RO) {
+ virLibDomainError(VIR_ERR_OPERATION_DENIED, __FUNCTION__);
+ goto error;
+ }
+
+ conn = domain->conn;
+
+ if (conn->driver->domainSetGuestVcpu) {
+ int ret;
+ ret = conn->driver->domainSetGuestVcpu(domain, id, online, flags);
+ if (ret < 0)
+ goto error;
+ return ret;
+ }
+
+ virLibConnError(VIR_ERR_NO_SUPPORT, __FUNCTION__);
+
+error:
+ virDispatchError(domain->conn);
+ return -1;
+}
+
+
/**
* virDomainGetVcpusFlags:
* @domain: pointer to domain object, or NULL for Domain0
diff --git a/src/libvirt_public.syms b/src/libvirt_public.syms
index 04465be..bbb7c77 100644
--- a/src/libvirt_public.syms
+++ b/src/libvirt_public.syms
@@ -624,6 +624,7 @@ LIBVIRT_1.0.6 {
LIBVIRT_1.0.7 {
global:
virDomainGetVCPUMap;
+ virDomainSetGuestVcpu;
} LIBVIRT_1.0.6;
diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c
index 99fa3c1..4dca3eb 100644
--- a/src/remote/remote_driver.c
+++ b/src/remote/remote_driver.c
@@ -6395,6 +6395,7 @@ static virDriver remote_driver = {
.domainFSTrim = remoteDomainFSTrim, /* 1.0.1 */
.domainLxcOpenNamespace = remoteDomainLxcOpenNamespace, /* 1.0.2 */
.domainGetVCPUMap = remoteDomainGetVCPUMap, /* 1.0.7 */
+ .domainSetGuestVcpu = remoteDomainSetGuestVcpu, /* 1.0.7 */
};
static virNetworkDriver network_driver = {
diff --git a/src/remote/remote_protocol.x b/src/remote/remote_protocol.x
index cec3541..374df42 100644
--- a/src/remote/remote_protocol.x
+++ b/src/remote/remote_protocol.x
@@ -2748,6 +2748,13 @@ struct remote_domain_get_vcpu_map_ret {
int ret;
};
+struct remote_domain_set_guest_vcpu_args {
+ remote_nonnull_domain dom;
+ unsigned int id;
+ unsigned int online;
+ unsigned int flags;
+};
+
struct remote_domain_fstrim_args {
remote_nonnull_domain dom;
remote_string mountPoint;
@@ -4450,6 +4457,12 @@ enum remote_procedure {
/**
* @generate: none
*/
- REMOTE_PROC_DOMAIN_GET_VCPU_MAP = 302
+ REMOTE_PROC_DOMAIN_GET_VCPU_MAP = 302,
+
+ /**
+ * @generate: both
+ */
+ REMOTE_PROC_DOMAIN_SET_GUEST_VCPU = 303
+
};
diff --git a/src/remote_protocol-structs b/src/remote_protocol-structs
index e1ceabd..0ded7d8 100644
--- a/src/remote_protocol-structs
+++ b/src/remote_protocol-structs
@@ -2198,6 +2198,12 @@ struct remote_domain_get_vcpu_map_ret {
} cpumap;
int ret;
};
+struct remote_domain_set_guest_vcpu_args {
+ remote_nonnull_domain dom;
+ u_int id;
+ u_int online;
+ u_int flags;
+};
struct remote_domain_fstrim_args {
remote_nonnull_domain dom;
remote_string mountPoint;
@@ -2507,4 +2513,5 @@ enum remote_procedure {
REMOTE_PROC_DOMAIN_MIGRATE_SET_COMPRESSION_CACHE = 300,
REMOTE_PROC_NODE_DEVICE_DETACH_FLAGS = 301,
REMOTE_PROC_DOMAIN_GET_VCPU_MAP = 302,
+ REMOTE_PROC_DOMAIN_SET_GUEST_VCPU = 303,
};
--
1.8.2.1
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