mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-12-23 22:25:25 +00:00
994e7567b6
Done mechanically with:
$ git grep -l '\bDEBUG0\? *(' | xargs -L1 sed -i 's/\bDEBUG0\? *(/VIR_&/'
followed by manual deletion of qemudDebug in daemon/libvirtd.c, along
with a single 'make syntax-check' fallout in the same file, and the
actual deletion in src/util/logging.h.
* src/util/logging.h (DEBUG, DEBUG0): Delete.
* daemon/libvirtd.h (qemudDebug): Likewise.
* global: Change remaining clients over to VIR_DEBUG counterpart.
189 lines
6.6 KiB
Diff
189 lines
6.6 KiB
Diff
From 9d2c60799271d605f82dfd4bfa6ed7d14ad87e26 Mon Sep 17 00:00:00 2001
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From: Eric Blake <eblake@redhat.com>
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Date: Mon, 27 Sep 2010 09:37:22 -0600
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Subject: [PATCH 04/15] vcpu: implement the public APIs
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Factors common checks (such as nonzero vcpu count) up front, but
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drivers will still need to do additional flag checks.
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* src/libvirt.c (virDomainSetVcpusFlags, virDomainGetVcpusFlags):
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New functions.
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(virDomainSetVcpus, virDomainGetMaxVcpus): Refer to new API.
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---
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src/libvirt.c | 140 ++++++++++++++++++++++++++++++++++++++++++++++++++++++---
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1 files changed, 134 insertions(+), 6 deletions(-)
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diff --git a/src/libvirt.c b/src/libvirt.c
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index 629d97b..1b39210 100644
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--- a/src/libvirt.c
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+++ b/src/libvirt.c
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@@ -5192,7 +5192,9 @@ error:
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* This function requires privileged access to the hypervisor.
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*
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* This command only changes the runtime configuration of the domain,
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- * so can only be called on an active domain.
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+ * so can only be called on an active domain. It is hypervisor-dependent
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+ * whether it also affects persistent configuration; for more control,
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+ * use virDomainSetVcpusFlags().
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*
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* Returns 0 in case of success, -1 in case of failure.
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*/
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@@ -5237,13 +5239,139 @@ error:
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}
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/**
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+ * virDomainSetVcpusFlags:
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+ * @domain: pointer to domain object, or NULL for Domain0
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+ * @nvcpus: the new number of virtual CPUs for this domain, must be at least 1
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+ * @flags: an OR'ed set of virDomainVcpuFlags
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+ *
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+ * Dynamically change the number of virtual CPUs used by the domain.
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+ * Note that this call may fail if the underlying virtualization hypervisor
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+ * does not support it or if growing the number is arbitrary limited.
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+ * This function requires privileged access to the hypervisor.
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+ *
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+ * @flags must include VIR_DOMAIN_VCPU_LIVE to affect a running
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+ * domain (which may fail if domain is not active), or
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+ * VIR_DOMAIN_VCPU_CONFIG to affect the next boot via the XML
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+ * description of the domain. Both flags may be set.
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+ *
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+ * If @flags includes VIR_DOMAIN_VCPU_MAXIMUM, then
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+ * VIR_DOMAIN_VCPU_LIVE must be clear, and only the maximum virtual
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+ * CPU limit is altered; generally, this value must be less than or
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+ * equal to virConnectGetMaxVcpus(). Otherwise, this call affects the
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+ * current virtual CPU limit, which must be less than or equal to the
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+ * maximum limit.
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+ *
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+ * Returns 0 in case of success, -1 in case of failure.
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+ */
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+
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+int
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+virDomainSetVcpusFlags(virDomainPtr domain, unsigned int nvcpus,
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+ unsigned int flags)
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+{
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+ virConnectPtr conn;
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+ VIR_DEBUG("domain=%p, nvcpus=%u, flags=%u", domain, nvcpus, flags);
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+
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+ virResetLastError();
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+
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+ if (!VIR_IS_CONNECTED_DOMAIN(domain)) {
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+ virLibDomainError(NULL, VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
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+ virDispatchError(NULL);
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+ return (-1);
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+ }
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+ if (domain->conn->flags & VIR_CONNECT_RO) {
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+ virLibDomainError(domain, VIR_ERR_OPERATION_DENIED, __FUNCTION__);
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+ goto error;
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+ }
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+
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+ /* Perform some argument validation common to all implementations. */
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+ if (nvcpus < 1 || (unsigned short) nvcpus != nvcpus ||
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+ (flags & (VIR_DOMAIN_VCPU_LIVE | VIR_DOMAIN_VCPU_CONFIG)) == 0) {
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+ virLibDomainError(domain, VIR_ERR_INVALID_ARG, __FUNCTION__);
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+ goto error;
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+ }
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+ conn = domain->conn;
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+
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+ if (conn->driver->domainSetVcpusFlags) {
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+ int ret;
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+ ret = conn->driver->domainSetVcpusFlags (domain, nvcpus, flags);
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+ if (ret < 0)
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+ goto error;
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+ return ret;
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+ }
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+
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+ virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
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+
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+error:
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+ virDispatchError(domain->conn);
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+ return -1;
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+}
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+
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+/**
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+ * virDomainGetVcpusFlags:
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+ * @domain: pointer to domain object, or NULL for Domain0
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+ * @flags: an OR'ed set of virDomainVcpuFlags
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+ *
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+ * Query the number of virtual CPUs used by the domain. Note that
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+ * this call may fail if the underlying virtualization hypervisor does
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+ * not support it. This function requires privileged access to the
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+ * hypervisor.
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+ *
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+ * @flags must include either VIR_DOMAIN_VCPU_ACTIVE to query a
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+ * running domain (which will fail if domain is not active), or
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+ * VIR_DOMAIN_VCPU_PERSISTENT to query the XML description of the
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+ * domain. It is an error to set both flags.
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+ *
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+ * If @flags includes VIR_DOMAIN_VCPU_MAXIMUM, then the maximum
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+ * virtual CPU limit is queried. Otherwise, this call queries the
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+ * current virtual CPU limit.
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+ *
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+ * Returns 0 in case of success, -1 in case of failure.
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+ */
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+
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+int
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+virDomainGetVcpusFlags(virDomainPtr domain, unsigned int flags)
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+{
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+ virConnectPtr conn;
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+ VIR_DEBUG("domain=%p, flags=%u", domain, flags);
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+
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+ virResetLastError();
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+
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+ if (!VIR_IS_CONNECTED_DOMAIN(domain)) {
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+ virLibDomainError(NULL, VIR_ERR_INVALID_DOMAIN, __FUNCTION__);
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+ virDispatchError(NULL);
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+ return (-1);
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+ }
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+
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+ /* Exactly one of these two flags should be set. */
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+ if (!(flags & VIR_DOMAIN_VCPU_LIVE) == !(flags & VIR_DOMAIN_VCPU_CONFIG)) {
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+ virLibDomainError(domain, VIR_ERR_INVALID_ARG, __FUNCTION__);
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+ goto error;
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+ }
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+ conn = domain->conn;
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+
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+ if (conn->driver->domainGetVcpusFlags) {
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+ int ret;
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+ ret = conn->driver->domainGetVcpusFlags (domain, flags);
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+ if (ret < 0)
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+ goto error;
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+ return ret;
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+ }
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+
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+ virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
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+
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+error:
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+ virDispatchError(domain->conn);
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+ return -1;
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+}
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+
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+/**
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* virDomainPinVcpu:
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* @domain: pointer to domain object, or NULL for Domain0
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* @vcpu: virtual CPU number
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* @cpumap: pointer to a bit map of real CPUs (in 8-bit bytes) (IN)
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- * Each bit set to 1 means that corresponding CPU is usable.
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- * Bytes are stored in little-endian order: CPU0-7, 8-15...
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- * In each byte, lowest CPU number is least significant bit.
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+ * Each bit set to 1 means that corresponding CPU is usable.
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+ * Bytes are stored in little-endian order: CPU0-7, 8-15...
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+ * In each byte, lowest CPU number is least significant bit.
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* @maplen: number of bytes in cpumap, from 1 up to size of CPU map in
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* underlying virtualization system (Xen...).
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* If maplen < size, missing bytes are set to zero.
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@@ -5371,9 +5499,9 @@ error:
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*
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* Provides the maximum number of virtual CPUs supported for
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* the guest VM. If the guest is inactive, this is basically
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- * the same as virConnectGetMaxVcpus. If the guest is running
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+ * the same as virConnectGetMaxVcpus(). If the guest is running
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* this will reflect the maximum number of virtual CPUs the
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- * guest was booted with.
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+ * guest was booted with. For more details, see virDomainGetVcpusFlags().
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*
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* Returns the maximum of virtual CPU or -1 in case of error.
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*/
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--
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1.7.2.3
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