Commit Graph

39 Commits

Author SHA1 Message Date
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
Peter Krempa
aa50a5c727 doc: storage: Explicitly state that it's possible to have non-unique key
With most of our storage backends it's possible to have two separate
volume keys to point to a single volume. (By creating sym/hard-links to
local files or by mounting remote filesystems to two different locations
and creating pools on top of them) Document this possibility.
2014-03-05 09:51:24 +01:00
Eric Blake
ecd881b7a7 storage: add network-dir as new storage volume type
In the 'directory' and 'netfs' storage pools, a user can see
both 'file' and 'dir' storage volume types, to know when they
can descend into a subdirectory.  But in a network-based storage
pool, such as the upcoming 'gluster' pool, we use 'network'
instead of 'file', and did not have any counterpart for a
directory until this patch.  Adding a new volume type
'network-dir' is better than reusing 'dir', because it makes
it clear that the only way to access 'network' volumes within
that container is through the network mounting (leaving 'dir'
for something accessible in the local file system).

* include/libvirt/libvirt.h.in (virStorageVolType): Expand enum.
* docs/formatstorage.html.in: Document it.
* docs/schemasa/storagevol.rng (vol): Allow new value.
* src/conf/storage_conf.c (virStorageVol): Use new value.
* src/qemu/qemu_command.c (qemuBuildVolumeString): Fix client.
* src/qemu/qemu_conf.c (qemuTranslateDiskSourcePool): Likewise.
* tools/virsh-volume.c (vshVolumeTypeToString): Likewise.
* src/storage/storage_backend_fs.c
(virStorageBackendFileSystemVolDelete): Likewise.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-11-25 12:29:49 -07:00
Eric Blake
ed5fa7f393 storage: document gluster pool
Add support for a new <pool type='gluster'>, similar to
RBD and Sheepdog.  Terminology wise, a gluster volume
forms a libvirt storage pool, within the gluster volume,
individual files are treated as libvirt storage volumes.

* docs/schemas/storagepool.rng (poolgluster): New pool type.
* docs/formatstorage.html.in: Document gluster.
* docs/storage.html.in: Likewise, and contrast it with netfs.
* tests/storagepoolxml2xmlin/pool-gluster.xml: New test.
* tests/storagepoolxml2xmlout/pool-gluster.xml: Likewise.
* tests/storagepoolxml2xmltest.c (mymain): Likewise.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-11-25 11:03:19 -07:00
Eric Blake
1b5c8d4cbc storage: expose volume meta-type in XML
I got annoyed at having to use both 'virsh vol-list $pool --details'
AND 'virsh vol-dumpxml $vol $pool' to learn if I had populated
the volume correctly.  Since two-thirds of the data present in
virStorageVolGetInfo() already appears in virStorageVolGetXMLDesc(),
this just adds the remaining piece of information, as:

<volume type='...'>
  ...
</volume>

* docs/formatstorage.html.in: Document new <volume type=...>.
* docs/schemas/storagevol.rng (vol): Add it to RelaxNG.
* src/conf/storage_conf.h (virStorageVolTypeToString): Declare.
* src/conf/storage_conf.c (virStorageVolTargetDefFormat): Output
the metatype.
(virStorageVolDefParseXML): Parse it, for unit tests.
* tests/storagevolxml2xmlout/vol-*.xml: Update tests to match.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-11-25 10:55:19 -07:00
Eric Blake
59dce8d278 storage: document existing pools
We forgot to document several pool types.

* docs/formatstorage.html.in: Add docs for scsi, mpath, rbd, and
sheepdog.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-10-16 09:57:31 -06:00
John Ferlan
c753749c27 docs: Update iSCSI storage pool example
Update the iSCSI storage pool example to include the secret
2013-08-20 13:27:44 -04:00
Philipp Hahn
ced2e3bed3 doc: storage pool permission copy-paste fix
The description for <permissions> was copied from the storage volume
section to the storage pool section, but the semantics are different:
1. Currently only the "dir", "fs" and "netfs" storage pools use it.
2. They use it only to build the final directory.
3. A default for the storage volumes can't be set.

Signed-off-by: Philipp Hahn <hahn@univention.de>
2013-08-13 14:55:04 -06:00
John Ferlan
eb0d79c64b storage_pool: Rework chap XML to mimic ceph
The existing 'chap' XML logic was never used - just defined.  Rather than
try to insert a square peg into a round hole, blow it up and rewrite the
logic to follow the 'ceph' format.

Remove the former "chap.login" and "chap.passwd" fields and replace
with "chap.username" and "chap.secret" in _virStoragePoolAuthChap.
Adjust the virStoragePoolDefParseAuthChap() to process.

Change the rng file to describe the new layout

Update the formatstorage.html to describe the usage of the secret element
to mention that the secret type "iscsi" and "ceph" can be used
to storage pool too.

Update the formatsecret.html to include a reference to the storage pool

Update tests to handle the changes from 'login' and 'passwd' to 'username'
and '<secret>' format
2013-07-15 12:41:12 -04:00
Ján Tomko
11a5c957f4 Use 1.1.0 everywhere in the documentation
Since we already have the v1.1.0-rc1 tag in git.
2013-06-25 15:37:31 +02:00
Ján Tomko
31d42506fb conf: add features to volume target XML
Add <features> and <compat> elements to volume target XML.

<compat> is a string which for qcow2 represents the QEMU version
it should be compatible with. Valid values are 0.10 and 1.1.
1.1 is implicit if the <features> element is present, otherwise
qemu-img default is used. 0.10 can be specified to explicitly
create older images after the qemu-img default changes.

<features> contains optional features, so far
<lazy_refcounts/> is available, which enables caching of reference
counters, improving performance for snapshots.
2013-06-21 13:25:30 +02:00
Ján Tomko
3452400673 docs: add spaces to formatstorage.html
Let the pool types breathe.
2013-06-04 15:56:44 +02:00
Daniel P. Berrange
f2f9742d4d Fix multiple formatting problems in HTML docs
The rule generating the HTML docs passing the --html flag
to xsltproc. This makes it use the legacy HTML parser, which
either ignores or tries to fix all sorts of broken XML tags.
There's no reason why we should be writing broken XML in
the first place, so removing --html and adding the XHTML
doctype to all files forces us to create good XML.

This adds the XHTML doc type and fixes many, many XML tag
problems it exposes.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-03 15:56:15 +01:00
Osier Yang
c1f63a9bdf storage: Make the adapter name be consistent with node device driver
node device driver names the HBA like "scsi_host5", but storage
driver uses "host5", which could make the user confused. This
changes them to be consistent. However, for back-compat reason,
adapter name like "host5" is still supported.
2013-04-08 18:41:06 +08:00
Osier Yang
9f781da69d New XML attributes for storage pool source adapter
This introduces 4 new attributes for storage pool source adapter.
E.g.

<adapter type='fc_host' parent='scsi_host5' wwnn='20000000c9831b4b' wwpn='10000000c9831b4b'/>

Attribute 'type' can be either 'scsi_host' or 'fc_host', and defaults
to 'scsi_host' if attribute 'name' is specified. I.e. It's optional
for 'scsi_host' adapter, for back-compat reason. However, mandatory
for 'fc_host' adapter and any new future adapter types. Attribute
'parent' is to specify the parent for the fc_host adapter.

* docs/formatstorage.html.in:
  - Add documents for the 4 new attrs
* docs/schemas/storagepool.rng:
  - Add RNG schema
* src/conf/storage_conf.c:
  - Parse and format the new XMLs
* src/conf/storage_conf.h:
  - New struct virStoragePoolSourceAdapter, replace "char *adapter" with it;
  - New enum virStoragePoolSourceAdapterType
* src/libvirt_private.syms:
  - Export TypeToString and TypeFromString
* src/phyp/phyp_driver.c:
  - Replace "adapter" with "adapter.data.name", which is member of the union
    of the new struct virStoragePoolSourceAdapter now. Later patch will
    add the checking, as "adapter.data.name" is only valid for "scsi_host"
    adapter.
* src/storage/storage_backend_scsi.c:
  - Like above
* tests/storagepoolxml2xmlin/pool-scsi-type-scsi-host.xml:
* tests/storagepoolxml2xmlin/pool-scsi-type-fc-host.xml:
  - New test for 'fc_host' and "scsi_host" adapter
* tests/storagepoolxml2xmlout/pool-scsi.xml:
  - Change the expected output, as the 'type' defaults to 'scsi_host' if 'name"
    specified now
* tests/storagepoolxml2xmlout/pool-scsi-type-scsi-host.xml:
* tests/storagepoolxml2xmlout/pool-scsi-type-fc-host.xml:
  - New test
* tests/storagepoolxml2xmltest.c:
  - Include the test
2013-04-08 18:41:06 +08:00
Christophe Fergeau
5ab0c045e3 Fix /pool/storage/name documentation
There was a 2 word sentence 'remote server' which is a left-over
from copy and paste.
2013-03-19 15:48:45 +01:00
Christophe Fergeau
ff1d26fae4 Fix /pool/storage/directory@path documentation
Because of a wrong copy and paste, the documentation was saying that
'path' is the path to a block device node while it's a path to a
directory.
2013-03-19 15:48:45 +01:00
Jiri Denemark
11677e081b docs: Clarify semantics of sparse storage volumes
Sparse LVM volumes do not behave in the way one would naively expect.
The allocation does not automatically increase (which is different from
how sparse files work).
2013-03-12 09:03:14 +01:00
Hendrik Schwartke
7383c1d762 Added timestamps to storage volumes
The access, birth, modification and change times are added to
storage volumes and corresponding xml representations.  This
shows up in the XML in this format:

<timestamps>
  <atime>1341933637.027319099</atime>
  <mtime>1341933637.027319099</mtime>
</timestamps>

Signed-off-by: Eric Blake <eblake@redhat.com>
2012-08-02 17:14:17 -06:00
Eric Blake
2e14861224 storage: support more scaling suffixes
Disk manufacturers are fond of quoting sizes in powers of 10,
rather than powers of 2 (after all, 2.1 GB sounds larger than
2.0 GiB, even though the exact opposite is true).  So, we might
as well follow coreutils' lead in supporting three types of
suffix: single letter ${u} (which we already had) and ${u}iB
for the power of 2, and ${u}B for power of 10.

Additionally, it is impossible to create a file with more than
2**63 bytes, since off_t is signed (if you have enough storage
to even create one 8EiB file, I'm jealous).  This now reports
failure up front rather than down the road when the kernel
finally refuses an impossible size.

* docs/schemas/basictypes.rng (unit): Add suffixes.
* src/conf/storage_conf.c (virStorageSize): Use new function.
* docs/formatstorage.html.in: Document it.
* tests/storagevolxml2xmlin/vol-file-backing.xml: Test it.
* tests/storagevolxml2xmlin/vol-file.xml: Likewise.
2012-03-07 18:24:43 -07:00
Eric Blake
9dfdeadc8a docs: use correct terminology for 1024 bytes
Yes, I like kilobytes better than kibibytes (when I say kilobytes,
I generally mean 1024).  But since the term is ambiguous, it can't
hurt to say what we mean, by using both the correct name and
calling out the numeric equivalent.

* src/libvirt.c (virDomainGetMaxMemory, virDomainSetMaxMemory)
(virDomainSetMemory, virDomainSetMemoryFlags)
(virNodeGetFreeMemory): Tweak wording.
* docs/formatdomain.html.in: Likewise.
* docs/formatstorage.html.in: Likewise.
2012-03-07 18:24:43 -07:00
Christophe Fergeau
6f75a28d9b Fix typo in storage pool documentation
Remove 2 words that shouldn't be here.
2011-12-19 16:33:42 +01:00
Philipp Hahn
338289a629 Fix broken XML entity for '>'
Add missing 'g' to '&gt;' of '<product />' source-element.

Signed-off-by: Philipp Hahn <hahn@univention.de>
2010-11-25 10:40:07 +01:00
Patrick Dignan
20be699ee3 storage: add support for Vendor and Model in XML
I wrote a patch to add support for listing the Vendor and Model of a
storage pool in the storage pool XML.  This would allow vendor
extensions of specific devices.  The patch includes a test for the new
attributes as well.

Patrick Dignan
2010-08-19 15:58:43 -06:00
Cole Robinson
c5bad3ad21 docs: storage: Document SCSI pools 2010-02-23 09:44:38 -05:00
Cole Robinson
e563b3b326 docs: storage: Fix backingStore <format> docs 2010-02-23 09:44:38 -05:00
Cole Robinson
f66dcd044f docs: storage: <volume><key> is always generated. 2010-02-23 09:44:38 -05:00
Cole Robinson
3a6555b345 docs: storage: Document capacity/alloc 'unit' 2010-02-23 09:44:38 -05:00
Matthew Booth
042956d558 Fix owner and group in example volume XML
The owner and group in the documentation examples were confusingly given as
'0744'. They should be numeric uid and gid. Changed the examples to use the
default uid and gid assigned to qemu in F12.

* docs/formatstorage.html.in: Change example owner and group in volume XML
2009-12-14 16:23:26 +01:00
Matthew Booth
c6d5ac174e Cleanup whitespace in docs
This patch is the result of running the following command in the docs
directory: sed -i 's/\t/        /g; s/\s*$//' *.html.in

* docs/*.html.in:convert tabs into 8 spaces and remove trailing whitespace
2009-11-06 16:05:18 +01:00
Miloslav Trmač
eda3af2488 Attach encryption information to virStorageVolDef.
The XML allows <encryption format='unencrypted'/>, this implementation
canonicalizes the internal representation so that "vol->encryption" is
non-NULL iff the volume is encrypted.

Note that partial encryption information (e.g. specifying an encryption
format, but not the key/passphrase) is valid, libvirt will automatically
choose value for the missing information during volume creation.  The
user can read the volume XML, and use the unmodified <encryption> tag in
future operations (without having to be able to understand) its contents.

* docs/formatstorage.html, docs/formatstorage.html.in: Document
  storage volume encryption options
* src/storage_conf.c, src/storage_conf.h: Hook up storage
  encryption XML handling
* tests/storagevolschemadata/vol-qcow2.xml: Test case for encryption
  schema changes
2009-09-01 18:27:38 +01:00
Daniel Veillard
110c64209c fix storage volume inconsistencies in schema and doc
* docs/schemas/storagevol.rng docs/formatstorage.html[.in]
  tests/storagevolschemadata/vol-qcow2.xml: fix storage volume
  inconsistencies in schema and document, patch by Ryota Ozaki
daniel
2009-05-29 12:27:45 +00:00
Daniel Veillard
8d96348704 * docs/formatstorage.html[.in]: fix a error in format type example
pointed out by Ryota Ozaki
Daniel
2009-05-21 08:03:13 +00:00
Daniel P. Berrange
489fde7680 Add support for copy-on-write storage volumes 2009-01-27 18:30:03 +00:00
Cole Robinson
76944e8137 Fix documentation cut and paste errors, and a virsh typo. 2008-12-04 14:51:57 +00:00
Daniel Veillard
41ce15a586 Adds storage source element for pools
* src/storage_backend.h src/storage_backend_logical.c
src/storage_conf.c src/storage_conf.h src/virsh.c:
Applied patches from David Lively to add storage source
elements needed for storage pool
* docs/formatstorage.html docs/formatstorage.html.in: associated
documentation
Daniel
2008-09-02 14:15:42 +00:00
Daniel P. Berrange
ff2ea6de4e Added autogenerated TOC for network and storage XML reference docs 2008-05-06 23:23:55 +00:00
Atsushi SAKAI
2ef22ecee3 * proxy/libvirt_proxy.c and docs/* typo fixing
Atsushi
2008-04-24 09:17:29 +00:00
Daniel P. Berrange
9092c3d491 Split website out into one file per page. APply new layout and styling 2008-04-23 17:08:31 +00:00