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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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Alex Jia 59d4b170fc virsh: avoid memory leak on cmdVolCreateAs 
* tools/virsh.c: fix memory leak on cmdVolCreateAs function.

* Detected in valgrind run:

==4746==
==4746== 48 (40 direct, 8 indirect) bytes in 1 blocks are definitely lost in loss record 26 of 52
==4746==    at 0x4A04A28: calloc (vg_replace_malloc.c:467)
==4746==    by 0x4C76E51: virAlloc (memory.c:101)
==4746==    by 0x4CD9418: virGetStoragePool (datatypes.c:592)
==4746==    by 0x4D21367: remoteStoragePoolLookupByName (remote_driver.c:4126)
==4746==    by 0x4CE42B0: virStoragePoolLookupByName (libvirt.c:10232)
==4746==    by 0x40C276: vshCommandOptPoolBy (virsh.c:13660)
==4746==    by 0x40CA37: cmdVolCreateAs (virsh.c:8094)
==4746==    by 0x412AF2: vshCommandRun (virsh.c:13770)
==4746==    by 0x422F11: main (virsh.c:15127)
==4746==
==4746== 1,011 bytes in 1 blocks are definitely lost in loss record 45 of 52
==4746==    at 0x4A05FDE: malloc (vg_replace_malloc.c:236)
==4746==    by 0x4A06167: realloc (vg_replace_malloc.c:525)
==4746==    by 0x4C76ECB: virReallocN (memory.c:161)
==4746==    by 0x4C60319: virBufferGrow (buf.c:72)
==4746==    by 0x4C606AA: virBufferAdd (buf.c:106)
==4746==    by 0x40CB37: cmdVolCreateAs (virsh.c:8118)
==4746==    by 0x412AF2: vshCommandRun (virsh.c:13770)
==4746==    by 0x422F11: main (virsh.c:15127)
==4746==
==4746== LEAK SUMMARY:
==4746==    definitely lost: 1,051 bytes in 2 blocks
==4746==    indirectly lost: 8 bytes in 1 blocks
==4746==      possibly lost: 0 bytes in 0 blocks
==4746==    still reachable: 390,767 bytes in 1,373 blocks
==4746==         suppressed: 0 bytes in 0 blocks

* How to reproduce?

% valgrind -v --leak-check=full virsh vol-create-as default foo.img 10M \
  --allocation 0 --format qcow2 --backing-vol bar.img

Notes: bar.img doesn't exist.

Signed-off-by: Alex Jia <ajia@redhat.com>
2011-09-01 12:41:00 -06:00
.gnulib@a6b16b69fe build: fix compilation on mingw64 2011-08-19 07:20:10 -06:00
daemon Fix tracking of RPC messages wrt streams 2011-09-01 10:52:35 +01:00
docs Add public API for getting migration speed 2011-09-01 11:26:21 -06:00
examples maint: add missing copyright notices 2011-07-28 15:01:17 -06:00
gnulib freebsd: Fix build problem due to picking up the wrong libvirt.h 2011-07-29 07:35:54 -06:00
include Add public API for getting migration speed 2011-09-01 11:26:21 -06:00
m4 tests: Lower stack usage below 4096 bytes 2011-04-30 19:59:52 +02:00
po hyperv: Add basic driver for Microsoft Hyper-V 2011-08-26 17:52:55 +02:00
python Add public API for getting migration speed 2011-09-01 11:26:21 -06:00
src build: fix 'make check' with pdwtags 2011-09-01 12:33:46 -06:00
tests Fix command test wrt gnutls initialize & fix debugging 2011-08-25 12:05:54 +01:00
tools virsh: avoid memory leak on cmdVolCreateAs 2011-09-01 12:41:00 -06:00
.dir-locals.el maint: let emacs avoid tabs in rng files 2011-08-13 08:56:26 -06:00
.gitignore hyperv: Add OpenWSMAN based client for the Hyper-V WMI API 2011-08-26 17:52:55 +02:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.mailmap virsh: Avoid using magic numbers for logging 2011-07-14 07:03:40 -06:00
AUTHORS maint: attribute second author of previous patch 2011-08-24 10:48:20 -06:00
autobuild.sh Remove the Open Nebula driver 2011-03-28 14:09:11 +01:00
autogen.sh build: avoid problems with autogen.sh runs from tarball 2011-02-12 06:28:28 -07:00
bootstrap build: fix compilation on mingw64 2011-08-19 07:20:10 -06:00
bootstrap.conf Add API for duplicating a socket/client file descriptor 2011-08-15 15:21:26 +02:00
cfg.mk hyperv: Add driver skeleton 2011-08-26 17:52:55 +02:00
ChangeLog-old generate ChangeLog from git logs into distribution tarball 2009-07-08 16:17:51 +02:00
configure.ac hyperv: Add configure check for OpenWSMAN 2011-08-26 17:52:54 +02:00
COPYING.LIB remove all trailing blank lines 2009-07-16 15:06:42 +02:00
HACKING build: rename files.h to virfile.h 2011-07-21 10:34:51 -06:00
libvirt.pc.in
libvirt.spec.in hyperv: Add configure check for OpenWSMAN 2011-08-26 17:52:54 +02:00
Makefile.am maint: add missing copyright notices 2011-07-28 15:01:17 -06:00
Makefile.nonreentrant Ban use of all inet_* functions 2010-10-22 11:59:23 +01:00
mingw32-libvirt.spec.in conf: put virtPortProfile struct / functions in a common location 2011-07-21 14:46:33 -04:00
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
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>