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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.
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e0c469e58b
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Philipp Hahn e0c469e58b storage: fix broken backing chain 
82507838 refactored the code to keep both the raw and canonicalized form
of the backingStore, which breaks badly when the storage pool contains a
storage volume, which is missing its backing store file:
 # ./daemon/libvirtd -l
 2012-11-07 12:43:33.279+0000: 22175: info : libvirt version: 1.0.0
 2012-11-07 12:43:33.279+0000: 22175: error : absolutePathFromBaseFile:542 : Can't canonicalize path '/var/lib/libvirt/images/base.qcow2': No such file or directory
 2012-11-07 12:43:33.280+0000: 22175: error : storageDriverAutostart:115 : Failed to autostart storage pool 'default': Can't canonicalize path '/var/lib/libvirt/images/base.qcow2': No such file or directory

This is because virStorageFileGetMetadataFromBuf() aborts with -1 if the
filename of the backingStore can not be canonicalized:
 #0  absolutePathFromBaseFile () at util/storage_file.c:541
 #1  virStorageFileGetMetadataFromBuf () at util/storage_file.c:728
 #2  virStorageFileGetMetadataFromFD () at util/storage_file.c:932
 #3  virStorageBackendProbeTarget () at storage/storage_backend_fs.c:94
 #4  virStorageBackendFileSystemRefresh () at storage/storage_backend_fs.c:849
 #5  storagePoolStart () at storage/storage_driver.c:700
 #6  virStoragePoolCreate () at libvirt.c:12471
 ...

Treat files which miss their backing file as standalone files.

Signed-off-by: Philipp Hahn <hahn@univention.de>
2012-11-08 16:03:36 -07:00
.gnulib@d245e6ddd6 maint: update to latest gnulib 2012-10-22 20:25:44 -06:00
build-aux Document bracket whitespace rules & add syntax-check rule 2012-11-02 14:00:32 +00:00
daemon Remove spurious whitespace between function name & open brackets 2012-11-02 13:36:49 +00:00
docs snapshot: new XML for external system checkpoint 2012-11-02 09:56:23 -06:00
examples Introduce new VIR_DOMAIN_EVENT_SUSPENDED_API_ERROR event 2012-11-07 12:06:05 +01:00
gnulib build: fix fresh checkout on RHEL5 2012-04-19 17:11:43 -06:00
include Introduce new VIR_DOMAIN_EVENT_SUSPENDED_API_ERROR event 2012-11-07 12:06:05 +01:00
m4 build: improve FORTIFY_SOURCE usage 2012-10-23 14:00:32 -06:00
po Release of libvirt-1.0.0 2012-11-02 12:08:11 +08:00
python Remove spurious whitespace between function name & open brackets 2012-11-02 13:36:49 +00:00
src storage: fix broken backing chain 2012-11-08 16:03:36 -07:00
tests virsh: add snapshot-create-as memspec support 2012-11-07 09:04:18 -07:00
tools Fix "virsh create" example 2012-11-08 07:28:24 +01:00
.dir-locals.el build: avoid tabs that failed syntax-check 2012-09-06 09:43:46 -06:00
.gitignore gitignore: ignore more files 2012-11-05 15:56:42 +01:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.mailmap Autogenerate AUTHORS 2012-10-19 12:44:56 -04:00
AUTHORS.in Remove a couple duplicates from AUTHORS.in 2012-10-22 16:19:38 -04:00
autobuild.sh Switch automated builds to use Mingw64 toolchain instead of Mingw32 2012-06-25 10:41:10 +01:00
autogen.sh build: avoid infinite autogen loop 2012-10-01 09:47:38 -06:00
bootstrap maint: regenerate bootstrap 2012-07-27 09:34:04 -06:00
bootstrap.conf build: prefer mkostemp for multi-thread safety 2012-10-31 10:06:10 -06:00
cfg.mk Document bracket whitespace rules & add syntax-check rule 2012-11-02 14:00:32 +00:00
ChangeLog-old virterror.c: Fix several spelling mistakes 2012-02-03 11:32:51 -07:00
configure.ac Release of libvirt-1.0.0 2012-11-02 12:08:11 +08:00
COPYING.LIB remove all trailing blank lines 2009-07-16 15:06:42 +02:00
HACKING Document bracket whitespace rules & add syntax-check rule 2012-11-02 14:00:32 +00:00
libvirt.pc.in build: silence warning from autoconf 2012-05-30 09:22:02 -06:00
libvirt.spec.in spec: replace scriptlets with new systemd macros 2012-11-05 14:30:56 -07:00
Makefile.am Autogenerate AUTHORS 2012-10-19 12:44:56 -04:00
Makefile.nonreentrant Ban use of all inet_* functions 2010-10-22 11:59:23 +01:00
mingw-libvirt.spec.in parallels: add driver skeleton 2012-08-01 11:44:26 +08:00
README Correct typos in the documentation (Atsushi SAKAI) 2008-01-24 10:15:13 +00:00
README-hacking maint: relax git minimum version 2010-02-24 14:29:27 -05:00
run.in syntax-check: fix run.in 2012-09-18 13:59:53 +02:00
TODO Update todo list file to point at bugzilla/website 2010-10-13 16:45:26 +01:00

README 

         LibVirt : simple API for virtualization

  Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.

Daniel Veillard <veillard@redhat.com>