06e7ebb608
Currently if the virNetServer instance is created with max_workers==0 to request a non-threaded dispatch process, we deadlock during dispatch #0 0x00007fb845f6f42d in __lll_lock_wait () from /lib64/libpthread.so.0 #1 0x00007fb845f681d3 in pthread_mutex_lock () from /lib64/libpthread.so.0 #2 0x000055a6628bb305 in virMutexLock (m=<optimized out>) at util/virthread.c:89 #3 0x000055a6628a984b in virObjectLock (anyobj=<optimized out>) at util/virobject.c:435 #4 0x000055a66286fcde in virNetServerClientIsAuthenticated (client=client@entry=0x55a663a7b960) at rpc/virnetserverclient.c:1565 #5 0x000055a66286cc17 in virNetServerProgramDispatchCall (msg=0x55a663a7bc50, client=0x55a663a7b960, server=0x55a663a77550, prog=0x55a663a78020) at rpc/virnetserverprogram.c:407 #6 virNetServerProgramDispatch (prog=prog@entry=0x55a663a78020, server=server@entry=0x55a663a77550, client=client@entry=0x55a663a7b960, msg=msg@entry=0x55a663a7bc50) at rpc/virnetserverprogram.c:307 #7 0x000055a662871d56 in virNetServerProcessMsg (msg=0x55a663a7bc50, prog=0x55a663a78020, client=0x55a663a7b960, srv=0x55a663a77550) at rpc/virnetserver.c:148 #8 virNetServerDispatchNewMessage (client=0x55a663a7b960, msg=0x55a663a7bc50, opaque=0x55a663a77550) at rpc/virnetserver.c:227 #9 0x000055a66286e4c0 in virNetServerClientDispatchRead (client=client@entry=0x55a663a7b960) at rpc/virnetserverclient.c:1322 #10 0x000055a66286e813 in virNetServerClientDispatchEvent (sock=<optimized out>, events=1, opaque=0x55a663a7b960) at rpc/virnetserverclient.c:1507 #11 0x000055a662899be0 in virEventPollDispatchHandles (fds=0x55a663a7bdc0, nfds=<optimized out>) at util/vireventpoll.c:508 #12 virEventPollRunOnce () at util/vireventpoll.c:657 #13 0x000055a6628982f1 in virEventRunDefaultImpl () at util/virevent.c:327 #14 0x000055a6628716d5 in virNetDaemonRun (dmn=0x55a663a771b0) at rpc/virnetdaemon.c:858 #15 0x000055a662864c1d in main (argc=<optimized out>, #argv=0x7ffd105b4838) at logging/log_daemon.c:1235 Reviewed-by: John Ferlan <jferlan@redhat.com> Reviewed-by: Jim Fehlig <jfehlig@suse.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Libvirt API for virtualization
Libvirt provides a portable, long term stable C API for managing the virtualization technologies provided by many operating systems. It includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER Hypervisor.
For some of these hypervisors, it provides a stateful management daemon which runs on the virtualization host allowing access to the API both by non-privileged local users and remote users.
Layered packages provide bindings of the libvirt C API into other languages including Python, Perl, PHP, Go, Java, OCaml, as well as mappings into object systems such as GObject, CIM and SNMP.
Further information about the libvirt project can be found on the website:
License
The libvirt C API is distributed under the terms of GNU Lesser General
Public License, version 2.1 (or later). Some parts of the code that are
not part of the C library may have the more restrictive GNU General
Public License, version 2.1 (or later). See the files COPYING.LESSER
and COPYING for full license terms & conditions.
Installation
Libvirt uses the GNU Autotools build system, so in general can be built and installed with the usual commands. For example, to build in a manner that is suitable for installing as root, use:
$ ./configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var
$ make
$ sudo make install
While to build & install as an unprivileged user
$ ./configure --prefix=$HOME/usr
$ make
$ make install
The libvirt code relies on a large number of 3rd party libraries. These will
be detected during execution of the configure script and a summary printed
which lists any missing (optional) dependencies.
Contributing
The libvirt project welcomes contributions in many ways. For most components the best way to contribute is to send patches to the primary development mailing list. Further guidance on this can be found on the website:
https://libvirt.org/contribute.html
Contact
The libvirt project has two primary mailing lists:
- libvirt-users@redhat.com (for user discussions)
- libvir-list@redhat.com (for development only)
Further details on contacting the project are available on the website: