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3b94239ffb
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Michal Privoznik 3b94239ffb qemu_driver: Try KVM_CAP_MAX_VCPUS only if defined 
With our recent patch (1715c83b5f) we thrive to get the correct
number of maximal VCPUs. However, we are using a constant from
linux/kvm.h which may be not defined in every distro. Hence, we
should guard usage of the constant with ifdef preprocessor
directive. This was introduced in kernel:

    commit 8c3ba334f8588e1d5099f8602cf01897720e0eca
    Author: Sasha Levin <levinsasha928@gmail.com>
    Date:   Mon Jul 18 17:17:15 2011 +0300

    KVM: x86: Raise the hard VCPU count limit

    The patch raises the hard limit of VCPU count to 254.

    This will allow developers to easily work on scalability
    and will allow users to test high VCPU setups easily without
    patching the kernel.

    To prevent possible issues with current setups, KVM_CAP_NR_VCPUS
    now returns the recommended VCPU limit (which is still 64) - this
    should be a safe value for everybody, while a new KVM_CAP_MAX_VCPUS
    returns the hard limit which is now 254.

$ git desc 8c3ba334f
v3.1-rc7-48-g8c3ba33
2013-03-13 14:31:29 +01:00
..
conf virCaps: conf: start splitting out irrelevat data 2013-03-13 09:27:14 +01:00
cpu util: use new virendian.h macros 2013-02-12 09:00:17 -07:00
esx virCaps: conf: start splitting out irrelevat data 2013-03-13 09:27:14 +01:00
hyperv hyperv: Simplify hypervPrivate pointer handling in hypervOpen 2013-02-02 12:33:33 +01:00
interface interface: udev backend coverity NULL deref 2013-02-26 13:30:17 -06:00
libxl virCaps: conf: start splitting out irrelevat data 2013-03-13 09:27:14 +01:00
locking docs: aesthetical cleanups 2013-01-30 09:37:03 +01:00
lxc virCaps: conf: start splitting out irrelevat data 2013-03-13 09:27:14 +01:00
network bandwidth: Require network QoS if interface uses 'floor' 2013-03-11 10:51:32 +01:00
node_device nodedev: Implement virNodeDeviceLookupSCSIHostByWWN 2013-02-12 00:23:57 +08:00
nwfilter Fix libvirt upgrade path when nwfilter is used 2013-02-15 21:33:37 -05:00
openvz virCaps: conf: start splitting out irrelevat data 2013-03-13 09:27:14 +01:00
parallels virCaps: conf: start splitting out irrelevat data 2013-03-13 09:27:14 +01:00
phyp virCaps: conf: start splitting out irrelevat data 2013-03-13 09:27:14 +01:00
qemu qemu_driver: Try KVM_CAP_MAX_VCPUS only if defined 2013-03-13 14:31:29 +01:00
remote remote: Implement virDomainMigrate*CompressionCache 2013-02-22 17:35:59 +01:00
rpc Remove hack using existance of an 'identity' string to disable auth 2013-03-12 18:07:17 +00:00
secret Rename virterror.c virterror_internal.h to virerror.{c,h} 2012-12-21 11:19:50 +00:00
security virCaps: conf: start splitting out irrelevat data 2013-03-13 09:27:14 +01:00
storage storage: Cleanup logical volume creation code 2013-03-06 14:53:00 +01:00
test virCaps: conf: start splitting out irrelevat data 2013-03-13 09:27:14 +01:00
uml virCaps: conf: start splitting out irrelevat data 2013-03-13 09:27:14 +01:00
util Add API for thread cancellation 2013-03-12 18:07:11 +00:00
vbox virCaps: conf: start splitting out irrelevat data 2013-03-13 09:27:14 +01:00
vmware virCaps: conf: start splitting out irrelevat data 2013-03-13 09:27:14 +01:00
vmx Rename virterror.c virterror_internal.h to virerror.{c,h} 2012-12-21 11:19:50 +00:00
xen virCaps: conf: start splitting out irrelevat data 2013-03-13 09:27:14 +01:00
xenapi virCaps: conf: start splitting out irrelevat data 2013-03-13 09:27:14 +01:00
xenxs Rename virterror.c virterror_internal.h to virerror.{c,h} 2012-12-21 11:19:50 +00:00
check-symfile.pl Check for private symbols presence as well 2012-10-05 15:04:56 +02:00
check-symsorting.pl maint: enforce private symbol section sorting 2013-02-20 08:27:03 -07:00
datatypes.c Allow for multi-level inheritance of virObject classes 2013-01-15 19:21:31 +00:00
datatypes.h Rename threads.{c,h} to virthread.{c,h} 2012-12-21 11:19:49 +00:00
driver.c Rename util.{c,h} to virutil.{c,h} 2012-12-21 11:19:49 +00:00
driver.h Rename 'clone' to 'clonevol' to avoid name clash with clone() syscall 2013-03-07 18:06:11 +00:00
dtrace2systemtap.pl maint: fix up copyright notice inconsistencies 2012-09-20 16:30:55 -06:00
fdstream.c Rename virterror.c virterror_internal.h to virerror.{c,h} 2012-12-21 11:19:50 +00:00
fdstream.h Rename command.{c,h} to vircommand.{c,h} 2012-12-21 11:17:13 +00:00
gnutls_1_0_compat.h maint: fix up copyright notice inconsistencies 2012-09-20 16:30:55 -06:00
internal.h build: force correct gcc syntax for attribute_nonnull 2013-02-18 14:17:40 -07:00
libvirt_atomic.syms maint: check all symfiles for sorting 2013-02-22 16:48:12 -07:00
libvirt_daemon.syms maint: make it easier to sort syms files 2013-01-25 08:33:09 -07:00
libvirt_driver_modules.syms maint: one missed syms file 2013-01-26 09:59:12 -07:00
libvirt_esx.syms maint: enforce private symbol section sorting 2013-02-20 08:27:03 -07:00
libvirt_internal.h Add support for offline migration 2012-12-10 21:52:15 +01:00
libvirt_libssh2.syms maint: enforce private symbol section sorting 2013-02-20 08:27:03 -07:00
libvirt_linux.syms maint: enforce private symbol section sorting 2013-02-20 08:27:03 -07:00
libvirt_lxc.syms Introduce an LXC specific public API & library 2013-01-14 13:58:34 +00:00
libvirt_openvz.syms maint: enforce private symbol section sorting 2013-02-20 08:27:03 -07:00
libvirt_private.syms virCaps: conf: start splitting out irrelevat data 2013-03-13 09:27:14 +01:00
libvirt_probes.d Turn virNetClient* into virObject instances 2012-08-07 11:47:55 +01:00
libvirt_public.syms Introduce virDomainMigrate*CompressionCache APIs 2013-02-22 17:35:59 +01:00
libvirt_qemu_probes.d build: fix binary location in stap files --with-driver-modules 2012-08-10 23:11:26 -04:00
libvirt_qemu.syms qemu-agent: available in 0.10.0 2012-08-23 13:05:52 -06:00
libvirt_sasl.syms maint: enforce private symbol section sorting 2013-02-20 08:27:03 -07:00
libvirt_vmx.syms maint: enforce private symbol section sorting 2013-02-20 08:27:03 -07:00
libvirt_xenxs.syms maint: enforce private symbol section sorting 2013-02-20 08:27:03 -07:00
libvirt-lxc.c Introduce an LXC specific public API & library 2013-01-14 13:58:34 +00:00
libvirt-qemu.c Rename virterror.c virterror_internal.h to virerror.{c,h} 2012-12-21 11:19:50 +00:00
libvirt.c libvirt: Update headers for doc 2013-03-04 17:36:03 -05:00
libvirt.conf Allow overriding default URI in config file 2012-03-15 11:20:17 +00:00
lxc_protocol-structs build: add new file, for lxc_protocol checking 2013-01-15 12:01:22 -07:00
Makefile.am virCaps: conf: start splitting out irrelevat data 2013-03-13 09:27:14 +01:00
nodeinfo.c nodeinfo: don't define nodeGetCellMemory if it isn't ever used 2013-03-11 09:55:37 -06:00
nodeinfo.h cpustat: fix regression when cpus are offline 2012-10-26 15:34:52 -06:00
qemu_protocol-structs agent: add remote driver support 2012-08-23 19:05:50 +08:00
README hyperv: Add basic documentation 2011-08-26 17:52:55 +02:00
remote_protocol-structs remote: Implement virDomainMigrate*CompressionCache 2013-02-22 17:35:59 +01:00
virkeepaliveprotocol-structs build: Properly generate and check virkeepaliveprotocol-structs 2011-11-24 14:44:04 +01:00
virnetprotocol-structs Extend RPC protocol to allow FD passing 2011-10-28 10:27:15 +01:00

README 

       libvirt library code README
       ===========================

The directory provides the bulk of the libvirt codebase. Everything
except for the libvirtd daemon and client tools. The build uses a
large number of libtool convenience libraries - one for each child
directory, and then links them together for the final libvirt.so,
although some bits get linked directly to libvirtd daemon instead.

The files directly in this directory are supporting the public API
entry points & data structures.

There are two core shared modules to be aware of:

 * util/  - a collection of shared APIs that can be used by any
            code. This directory is always in the include path
            for all things built

 * conf/  - APIs for parsing / manipulating all the official XML
            files used by the public API. This directory is only
            in the include path for driver implementation modules

 * vmx/   - VMware VMX config handling (used by esx/ and vmware/)


Then there are the hypervisor implementations:

 * esx/          - VMware ESX and GSX support using vSphere API over SOAP
 * hyperv/       - Microsoft Hyper-V support using WinRM
 * lxc/          - Linux Native Containers
 * openvz/       - OpenVZ containers using cli tools
 * phyp/         - IBM Power Hypervisor using CLI tools over SSH
 * qemu/         - QEMU / KVM using qemu CLI/monitor
 * remote/       - Generic libvirt native RPC client
 * test/         - A "mock" driver for testing
 * uml/          - User Mode Linux
 * vbox/         - Virtual Box using native API
 * vmware/       - VMware Workstation and Player using the vmrun tool
 * xen/          - Xen using hypercalls, XenD SEXPR & XenStore
 * xenapi/       - Xen using libxenserver


Finally some secondary drivers that are shared for several HVs.
Currently these are used by LXC, OpenVZ, QEMU, UML and Xen drivers.
The ESX, Hyper-V, Power Hypervisor, Remote, Test & VirtualBox drivers all
implement the secondary drivers directly

 * cpu/          - CPU feature management
 * interface/    - Host network interface management
 * network/      - Virtual NAT networking
 * nwfilter/     - Network traffic filtering rules
 * node_device/  - Host device enumeration
 * secret/       - Secret management
 * security/     - Mandatory access control drivers
 * storage/      - Storage management drivers


Since both the hypervisor and secondary drivers can be built as
dlopen()able modules, it is *FORBIDDEN* to have build dependencies
between these directories. Drivers are only allowed to depend on
the public API, and the internal APIs in the util/ and conf/
directories