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Chunyan Liu a9fd30e633 storagevol: add nocow to vol xml 
Add 'nocow' to storage volume xml so that user can have an option
to set NOCOW flag to the newly created volume. It's useful on btrfs
file system to enhance performance.

Btrfs has low performance when hosting VM images, even more when the guest
in those VM are also using btrfs as file system. One way to mitigate this
bad performance is to turn off COW attributes on VM files. Generally, there
are two ways to turn off COW on btrfs: a) by mounting fs with nodatacow,
then all newly created files will be NOCOW. b) per file. Add the NOCOW file
attribute. It could only be done to empty or new files.

This patch tries the second way, according to 'nocow' option, it could set
NOCOW flag per file:
for raw file images, handle 'nocow' in libvirt code; for non-raw file images,
pass 'nocow=on' option to qemu-img, and let qemu-img to handle that (requires
qemu-img version >= 2.1).

Signed-off-by: Chunyan Liu <cyliu@suse.com>
2014-07-16 13:35:20 +02:00
..
api_extension xen_xs: name xendConfigVersion magic numbers 2012-02-01 16:28:17 -07:00
devhelp maint: consolidate several .gitignore files 2012-02-03 15:27:16 -07:00
html maint: consolidate several .gitignore files 2012-02-03 15:27:16 -07:00
internals util: fix a typo in virprocess.c and docs 2014-03-27 06:58:46 -06:00
schemas storagevol: add nocow to vol xml 2014-07-16 13:35:20 +02:00
32favicon.png * docs/site.xsl docs/*.png docs/*.html: update the images from Diana, 2006-01-23 22:55:41 +00:00
404.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
acl.html.in Add documentation for access control system 2013-08-09 17:13:02 +01:00
aclpolkit.html.in docs: aclpolkit: Fix a heading typo 2013-10-04 13:38:57 -04:00
api_extension.html.in maint: improve VIR_ERR_INVALID_CONN usage 2014-01-06 21:41:02 -07:00
api.html.in Document the need to free vir*Ptr objects 2014-07-09 09:22:20 +02:00
apibuild.py docs: publish correct enum values 2014-06-26 15:25:05 -06:00
apps.html.in docs: mention vagrant-libvirt in apps.html 2014-05-12 15:50:59 -06:00
archdomain.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
architecture.fig Remove trailing whitespace from all xfig files 2011-10-28 10:11:16 +01:00
architecture.gif * docs/architecture.* docs/*: added a section on the architecture 2005-12-21 16:59:34 +00:00
architecture.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
archnetwork.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
archnode.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
archstorage.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
auditlog.html.in audit: Audit smartcard devices 2014-07-07 12:56:45 +02:00
auth.html.in Add documentation for access control system 2013-08-09 17:13:02 +01:00
bindings.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
bugs.html.in Fix typos in various docs 2013-12-02 10:21:26 +08:00
cgroups.html.in docs: cgroups: fix typo about LXC cgroups 2014-03-27 06:52:20 -06:00
compiling.html.in build: honor autogen.sh --no-git 2013-07-09 16:15:29 -06:00
contact.html.in Document security reporting & handling process 2013-07-01 11:08:58 +08:00
csharp.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
deployment.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
devguide.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
docs.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
downloads.html.in docs: mention maintenance branches 2014-01-15 09:12:25 -07:00
drivers.html.in bhyve: add basic documentation 2014-03-01 23:44:58 +04:00
drvbhyve.html.in docs: bhyve driver documentation improvements 2014-06-01 20:36:13 +04:00
drvesx.html.in typos: fix s/it/is/ where applicable 2014-05-05 11:49:36 +02:00
drvhyperv.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
drvlxc.html.in LXC: added some doc on domxml-from-native with mention of limitations 2014-02-12 17:52:47 +00:00
drvopenvz.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
drvparallels.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
drvphyp.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
drvqemu.html.in Fix docs generator regression in previous commit 2013-05-03 16:58:46 +01:00
drvremote.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
drvtest.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
drvuml.html.in docs: typo fix 2014-03-03 17:41:26 +04:00
drvvbox.html.in Move VirtualBox driver into libvirtd 2013-05-16 16:28:53 +01:00
drvvmware.html.in VMware: Initial VMware Fusion support 2013-09-29 18:40:36 +08:00
drvxen.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
errors.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
et.png * docs/Makefile.am docs/et.png docs/libvirt.css docs/page.xsl 2008-04-28 08:29:35 +00:00
firewall.html.in Fix typos in various docs 2013-12-02 10:21:26 +08:00
footer_corner.png Split website out into one file per page. APply new layout and styling 2008-04-23 17:08:31 +00:00
footer_pattern.png Split website out into one file per page. APply new layout and styling 2008-04-23 17:08:31 +00:00
format.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
formatcaps.html.in docs: mention more about older capability feature bits 2014-07-14 06:11:34 -06:00
formatdomain.html.in docs: formatdomain.html fixes 2014-07-04 18:28:39 +02:00
formatdomaincaps.html.in Introduce domain_capabilities 2014-07-03 12:22:37 +02:00
formatnetwork.html.in docs: document that vfio is default for hostdev networks too 2014-04-18 16:42:04 +03:00
formatnode.html.in nodedev: Introduce <pci-express/> to PCI devices 2014-06-16 17:40:49 +02:00
formatnwfilter.html.in nwfilter: Add ARP src/dst IP mask for ebtables ARP 2014-03-13 18:30:09 -04:00
formatsecret.html.in docs: remove <auth> from secret XML format 2014-02-14 16:47:14 +01:00
formatsnapshot.html.in doc: Document that snapshot name of block-backed disk isn't autogenerated 2014-07-14 09:26:26 +02:00
formatstorage.html.in storagevol: add nocow to vol xml 2014-07-16 13:35:20 +02:00
formatstorageencryption.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
genaclperms.pl Add documentation for access control system 2013-08-09 17:13:02 +01:00
generic.css Remove unnecessary empty first lines 2014-06-06 10:52:05 +02:00
goals.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
governance.html.in Fix minor typo in governance doc 2014-02-04 10:43:15 -07:00
hacking1.xsl maint: tweak use of <a> in HACKING 2013-07-09 11:49:20 -06:00
hacking2.xsl maint: tweak use of <a> in HACKING 2013-07-09 11:49:20 -06:00
hacking.html.in docs: Fix broken link in the HACKING page 2014-07-04 18:28:24 +02:00
hooks.html.in network: Introduce network hooks 2014-02-18 14:46:49 +01:00
hvsupport.pl New internal migration APIs with extensible parameters 2013-06-25 01:13:16 +02:00
index.html.in bhyve: add basic documentation 2014-03-01 23:44:58 +04:00
index.py Test for object identity when checking for None in Python 2013-08-23 08:12:26 +02:00
internals.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
intro.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
java.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
library.xen remove all trailing blank lines 2009-07-16 15:06:42 +02:00
libvirt-daemon-arch.fig Remove trailing whitespace from all xfig files 2011-10-28 10:11:16 +01:00
libvirt-daemon-arch.png build: regenerate .png files 2012-07-23 16:07:13 -06:00
libvirt-driver-arch.fig Remove trailing whitespace from all xfig files 2011-10-28 10:11:16 +01:00
libvirt-driver-arch.png build: regenerate .png files 2012-07-23 16:07:13 -06:00
libvirt-header-bg.png Split website out into one file per page. APply new layout and styling 2008-04-23 17:08:31 +00:00
libvirt-header-logo.png Split website out into one file per page. APply new layout and styling 2008-04-23 17:08:31 +00:00
libvirt-net-logical.fig Remove trailing whitespace from all xfig files 2011-10-28 10:11:16 +01:00
libvirt-net-logical.png build: regenerate .png files 2012-07-23 16:07:13 -06:00
libvirt-net-physical.fig Remove trailing whitespace from all xfig files 2011-10-28 10:11:16 +01:00
libvirt-net-physical.png build: regenerate .png files 2012-07-23 16:07:13 -06:00
libvirt-object-model.fig Remove trailing whitespace from all xfig files 2011-10-28 10:11:16 +01:00
libvirt-object-model.png build: regenerate .png files 2012-07-23 16:07:13 -06:00
libvirt-virConnect-example.fig internals: Update to include RPC and Lock links and add new data 2013-03-04 17:36:03 -05:00
libvirt-virConnect-example.png internals: Update to include RPC and Lock links and add new data 2013-03-04 17:36:03 -05:00
libvirt.css Remove unnecessary empty first lines 2014-06-06 10:52:05 +02:00
libvirtLogo404.png Add a custom 404 error page for the website 2012-06-18 20:10:29 +01:00
libvirtLogo.png * //* : renamed the project libvirt , this affects all makefiles, 2006-02-09 17:45:11 +00:00
locking.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
logging.html.in Remove global log buffer feature entirely 2014-03-18 14:29:22 +00:00
madeWith.png * //* : renamed the project libvirt , this affects all makefiles, 2006-02-09 17:45:11 +00:00
main.css Split website out into one file per page. APply new layout and styling 2008-04-23 17:08:31 +00:00
Makefile.am docs: Load libvirt_access*.xml from build dir 2013-09-23 14:16:45 +02:00
migration-managed-direct.fig Remove trailing whitespace from all xfig files 2011-10-28 10:11:16 +01:00
migration-managed-direct.png Add documentation about migration. 2011-10-28 10:07:45 +01:00
migration-managed-p2p.fig Remove trailing whitespace from all xfig files 2011-10-28 10:11:16 +01:00
migration-managed-p2p.png Add documentation about migration. 2011-10-28 10:07:45 +01:00
migration-native.fig Remove trailing whitespace from all xfig files 2011-10-28 10:11:16 +01:00
migration-native.png Add documentation about migration. 2011-10-28 10:07:45 +01:00
migration-tunnel.fig Remove trailing whitespace from all xfig files 2011-10-28 10:11:16 +01:00
migration-tunnel.png Add documentation about migration. 2011-10-28 10:07:45 +01:00
migration-unmanaged-direct.fig Remove trailing whitespace from all xfig files 2011-10-28 10:11:16 +01:00
migration-unmanaged-direct.png Add documentation about migration. 2011-10-28 10:07:45 +01:00
migration.html.in Fix minor typos in messages and docs 2013-07-30 07:07:33 -06:00
newapi.xsl docs: generate links from plain text documentation 2013-10-30 17:30:12 +01:00
news.html.in Release of libvirt-1.2.6 2014-07-02 13:50:18 +08:00
news.xsl Convert NEWS to UTF-8 2009-07-29 09:04:21 +01:00
node.fig Remove trailing whitespace from all xfig files 2011-10-28 10:11:16 +01:00
node.gif * doc/*: augment and try to complete the doc in its current state 2006-01-23 13:24:07 +00:00
page.xsl docs/page.xls: remove unnecessary namespace attribute 2014-01-30 15:37:38 +01:00
pending.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
php.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
python.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
relatedlinks.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
remote.html.in Fix typos in various docs 2013-12-02 10:21:26 +08:00
search.php.code.in docs: autogenerate search.php 2012-08-10 10:58:38 +02:00
search.php.in Repair the search on libvirt.org 2013-09-12 17:18:32 +08:00
secureusage.html.in Add some notes about secure usage of libvirt 2013-10-15 11:33:01 +01:00
securityprocess.html.in Fix three minor typos 2013-11-26 18:37:09 +08:00
site.xsl Fix docs generator regression in previous commit 2013-05-03 16:58:46 +01:00
sitemap.html.in Introduce domain_capabilities 2014-07-03 12:22:37 +02:00
storage.html.in gluster: Fix "key" attribute for gluster volumes 2014-04-01 08:44:34 +02:00
structures.fig Remove trailing whitespace from all xfig files 2011-10-28 10:11:16 +01:00
subsite.xsl virCommand: docs for usage of new command APIs 2010-12-02 16:00:47 -07:00
testapi.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
testsuites.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
testtck.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
todo.cfg-example Add automatic generation of a todo item page 2010-10-12 11:26:52 +01:00
todo.pl Fix namespace bugs in API docs, todo page & hv support page 2013-05-07 11:19:04 +01:00
uri.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
virshcmdref.html.in Fix multiple formatting problems in HTML docs 2013-05-03 15:56:15 +01:00
windows.html.in Point users to Virt-Viewer MSI installers for Windows builds 2013-05-07 15:29:37 +01:00
wrapstring.xsl Generate HACKING from docs/hacking.html.in 2010-11-12 19:47:20 +01:00