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Introduce a bunch of new public APIs related to backup checkpoints.
Checkpoints are modeled heavily after virDomainSnapshotPtr (both
represent a point in time of the guest), although a snapshot exists
with the intent of rolling back to that state, while a checkpoint
exists to make it possible to create an incremental backup at a later
time. We may have a future hypervisor that can completely manage
checkpoints without libvirt metadata, but the first two planned
hypervisors (qemu and test) both always use libvirt for tracking
metadata relations between checkpoints, so for now, I've deferred
the counterpart of virDomainSnapshotHasMetadata for a separate
API addition at a later date if there is ever a need for it.
Note that until we allow snapshots and checkpoints to exist
simultaneously on the same domain (although the actual prevention of
this will be in a separate patch for the sake of an easier revert down
the road), that it is not possible to branch out to create more than
one checkpoint child to a given parent, although it may become
possible later when we revert to a snapshot that coincides with a
checkpoint. This also means that for now, the decision of which
checkpoint becomes the parent of a newly created one is the only
checkpoint with no child (so while there are APIs for dealing with a
current snapshot, we do not need those for checkpoints). We may end
up exposing a notion of a current checkpoint later, but it's easier to
add stuff when proven needed than to blindly support it now and wish
we hadn't exposed it.
The following map shows the API relations to snapshots, with new APIs
on the right:
Operate on a domain object to create/redefine a child:
virDomainSnapshotCreateXML virDomainCheckpointCreateXML
Operate on a child object for lifetime management:
virDomainSnapshotDelete virDomainCheckpointDelete
virDomainSnapshotFree virDomainCheckpointFree
virDomainSnapshotRef virDomainCheckpointRef
Operate on a child object to learn more about it:
virDomainSnapshotGetXMLDesc virDomainCheckpointGetXMLDesc
virDomainSnapshotGetConnect virDomainCheckpointGetConnect
virDomainSnapshotGetDomain virDomainCheckpointGetDomain
virDomainSnapshotGetName virDomainCheckpiontGetName
virDomainSnapshotGetParent virDomainCheckpiontGetParent
virDomainSnapshotHasMetadata (deferred for later)
virDomainSnapshotIsCurrent (no counterpart, see note above)
Operate on a domain object to list all children:
virDomainSnapshotNum (no counterparts, these are the old
virDomainSnapshotListNames racy interfaces)
virDomainSnapshotListAllSnapshots virDomainListAllCheckpoints
Operate on a child object to list descendents:
virDomainSnapshotNumChildren (no counterparts, these are the old
virDomainSnapshotListChildrenNames racy interfaces)
virDomainSnapshotListAllChildren virDomainCheckpointListAllChildren
Operate on a domain to locate a particular child:
virDomainSnapshotLookupByName virDomainCheckpointLookupByName
virDomainSnapshotCurrent (no counterpart, see note above)
virDomainHasCurrentSnapshot (no counterpart, old racy interface)
Operate on a snapshot to roll back to earlier state:
virDomainSnapshotRevert (no counterpart, instead checkpoints
are used in incremental backups via
XML to virDomainBackupBegin)
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Big number itself does not make much sense in some cases. Format the
bitshift format as well.
Changes our web page docs from:
VIR_MIGRATE_POSTCOPY = 32768 : Setting the VIR_MIGRATE_POSTCOPY...
VIR_MIGRATE_TLS = 65536 : Setting the VIR_MIGRATE_TLS flag...
to:
VIR_MIGRATE_POSTCOPY = 32768 (0x8000; 1 << 15) : Setting the VIR_MIGRATE_POSTCOPY...
VIR_MIGRATE_TLS = 65536 (0x10000; 1 << 16) : Setting the VIR_MIGRATE_TLS flag...
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Require that all headers are guarded by a symbol named
LIBVIRT_$FILENAME
where $FILENAME is the uppercased filename, with all characters
outside a-z changed into '_'.
Note we do not use a leading __ because that is technically a
namespace reserved for the toolchain.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
In many files there are header comments that contain an Author:
statement, supposedly reflecting who originally wrote the code.
In a large collaborative project like libvirt, any non-trivial
file will have been modified by a large number of different
contributors. IOW, the Author: comments are quickly out of date,
omitting people who have made significant contribitions.
In some places Author: lines have been added despite the person
merely being responsible for creating the file by moving existing
code out of another file. IOW, the Author: lines give an incorrect
record of authorship.
With this all in mind, the comments are useless as a means to identify
who to talk to about code in a particular file. Contributors will always
be better off using 'git log' and 'git blame' if they need to find the
author of a particular bit of code.
This commit thus deletes all Author: comments from the source and adds
a rule to prevent them reappearing.
The Copyright headers are similarly misleading and inaccurate, however,
we cannot delete these as they have legal meaning, despite being largely
inaccurate. In addition only the copyright holder is permitted to change
their respective copyright statement.
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Improve readability and reduce the complexity of the code that is
searching for string tokens (i.e. characters surrounded by a single
or double quote).
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>
Reduce the number of if-statements used to assign a literals
to corresponding class variables.
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>
Improve readability and reduce complexity the method
parseTypeComment().
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>
The method strip_lead_star() removes a single leading asterisk
character from a string by ignoring leading whitespace, otherwise it
returns the original string.
This could be achieved with a single if-statement followed by replace.
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>
Backslash between brackets in Python is redundant. [1]
1: https://lintlyci.github.io/Flake8Rules/rules/E502.html
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>
The uniq() function returns a sorted list, there is no need
to sort this list again.
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>
Use a set (unordered collections of unique elements) [1] to remove
repeated elements in a list.
1: https://docs.python.org/3/tutorial/datastructures.html#sets
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>
PEP8 recommends not having spaces around = in a keyword argument or
a default parameter value.
https://www.python.org/dev/peps/pep-0008/#other-recommendations
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>
Improve readability by reducing the complexity and length of
conditional statements.
Example: The following condition:
if (o >= 97 and o <= 122) or
(o >= 65 and o <= 90) or
(o >= 48 and o <= 57) or
(" \t(){}:;,+-*/%&!|[]=><".find(line[i]) == -1):
Will be True for every character that is not in string:
" \t(){}:;,+-*/%&!|[]=><"
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>
PEP8 recommends removing whitespace immediately before a comma,
semicolon, or colon [1]. In addition remove multiple spaces after
keyword (PEP8 - E271).
1: https://www.python.org/dev/peps/pep-0008/#whitespace-in-expressions-and-statements
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>
PEP8 recommends imports to be on separate lines. [1]
1: https://www.python.org/dev/peps/pep-0008/#imports
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>
The isinstance() function [1] returns true if an object argument is an
instance of a classinfo argument or of a direct, indirect subclass
thereof.
1: https://docs.python.org/3/library/functions.html#isinstance
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Radostin Stoyanov <rstoyanov1@gmail.com>
Some of our scripts are known to work both with Python 2 and
Python 3, so for them we shouldn't be forcing any specific
version of the interpreter when they're called directly; we
always use $(PYTHON) explicitly in our build rules anyway.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Another usage of deprecated 'string' functions. We are just trying to
match ascii letters here, so use a simple regex. And again drop the
aggressive exception handling, it doesn't seem to trigger for anything
in libvirt code.
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Module 'string' function lower doesn't exist in python3. The canonical
way is to call .lower() on a str instance. Do that, and make the
exception handling more specific, which would have made this issue
obvious.
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Commit id '477502de3' altered the entry to add one too many closing
parenthesis ')' and that propagated into commit id '9176b42bd'.
Signed-off-by: John Ferlan <jferlan@redhat.com>
The keys() method no longer returns a list, so converting the
return value would be necessary before calling sort() on it;
alternatively, we can just call sorted(), which returns a
sorted list.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
For list concatenation to work, the value returned by the
keys() method must be converted to a list first.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
All of these have been replaced with methods.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This replaces uses of the has_key() method.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This is particularly useful on operating systems that don't ship
Python as part of the base system (eg. FreeBSD) while still working
just as well as it did before on Linux.
While at it, make it explicit that our scripts are only going to
work with Python 2, and remove the usage of unbuffered I/O, which
as far as I can tell has no effect on the output files.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
After f4cb85c6af we only have two options for placing enum
values descriptions. It's either:
typedef enum {
/* Some long description. Therefore it's placed before
* the value. */
VIR_ENUM_A_VAL = 1,
} virEnumA;
or:
typedef enum {
VIR_ENUM_B_VAL = 1, /* Some short description */
} virEnumB;
However, our apibuild.py script is not able to deal with the
former one. It messes up comments. To fix this couple of things
needs to be done:
a) DO NOT reset self.comment in parseEnumBlock(). This is a
result from our tokenizer. Upon calling token() if it finds a
comment block it stores it in self.comment and returns the next
token (which is not comment). Therefore, if we reset self.comment
we might lose the first comment in the enum block.
b) we need a variable to track if the current enum block uses
value descriptions before or after values. That is if it's type
virEnumA or virEnumB. Depending on that, it we're dealing with
virEnumA type and the current token is a comma ',' we can add the
value into the list as we already have everything needed:
comment, name and value.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
Release tarballs ship the include/libvirt/libvirt-common.h.
when srcdir != builddir we end up including libvirt-common.h twice: from
$top_srcdir/include/libvirt-common.h and from
$builddir/include/libvirt-common.h leading to
function virTypedParamsGetUInt from /tmp/buildd/libvirt-2.4.0/debian/build/docs/../include/libvirt/libvirt-common.h redeclared in /tmp/buildd/libvirt-2.4.0/docs/../include/libvirt/libvirt-common.h
function virTypedParamsAddBoolean from /tmp/buildd/libvirt-2.4.0/debian/build/docs/../include/libvirt/libvirt-common.h redeclared in /tmp/buildd/libvirt-2.4.0/docs/../include/libvirt/libvirt-common.h
…
Only add the builddir to the search list if there is no pregenerated
libvirt-common.h.
Reuse the existing check that predates the libvirt.h → libvirt-common.h
split and that probably was meant for exactly that.
References: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=842452
When generating the hvsupport.html.in file, we parse the -api.xml
files generated by apibuild.py to know in which HTML file the API
function is.
Doing an XPath query for every single 'function' element in the
file is inefficient.
Since the XML file is generated by another of our build scripts
(apibuild.py, using Python's standard 'output.write' XML library),
just find the function name->file mapping by a regex upfront.
Also add a note about this next to the line that generates it
in apibuild.py and do not check if XML::XPath is installed in
bootstrap since we no longer use it.
In 38df47c9af I've tried to prepare our apibuild.py script for
change made in 0628f3498c (1U << 31). What I've done in the
former commit was to replace \d+U in parsed tokens with \d.
Problem was, my regular expression there was not quite right as
it also translated VIR_123U_VAL into VIR_123_VAL.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The apibuild script is a terrifying beast that parses some source
files of ours and produces an XML representation of them. When it
comes to parsing enums we have in some header files, it tries to
be clever and detect a value that an enum member has (or if it is
an alias for a different member). Whilst doing that it has to
deal with values we give to the members in many formats. At some
places we just pass the value in decimal:
VIR_DOMAIN_BLOCK_JOB_TYPE_PULL = 1,
in other places, we use the aliasing:
VIR_CONNECT_GET_ALL_DOMAINS_STATS_ACTIVE = VIR_CONNECT_LIST_DOMAINS_ACTIVE,
and in other places bitwise shifts are used:
VIR_CONNECT_GET_ALL_DOMAINS_STATS_ENFORCE_STATS = 1 << 31, /* enforce requested stats */
The script tries to parse all of these resulting in the following
tokens: "1", "VIR_CONNECT_LIST_DOMAINS_ACTIVE", "1<<31"; Then, the
script tries to turn these into integers using python's eval()
function. This function succeeds on the first and the last
tokens. But, if we were to modify the last example so that it's
of the following form:
VIR_CONNECT_GET_ALL_DOMAINS_STATS_ENFORCE_STATS = 1U << 31, /* enforce requested stats */
the token representing enum's member value will then be "1U<<31".
So our parsing is good. Unfortunately, python is not aware of the
difference between signed and unsigned C types, therefore eval()
fails over this token and the parser falls back thinking it's an
alias to another enum member. Well it's not.
The solution is to transform [0-9]U into [0-9] as for our
purposes here it's the same thing.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
All top-level functions have been moved to this class.
On top of that, the app.warning() method has been defined,
so that calls to it - already present in rebuild() - can
actually succeed.
libvirt-common.h is generated into builddir/include/libvirt. apibuild.py
only operated on srcdir/inlcude/libvirt. With VPATH build
srcdir/docs/libvirt-libvirt-common.html would not get generated and make
RPM failed.
Since commit f5d9c5d00c moved the virTypedParam stuff into
libvirt-common we did not generate any docs for them and neither did we
populate them into libvirt-api.xml. This broke the sanity check in
libvirt python. Fix it by generating docs for libvirt-common.h too.
Some macros don't make sense to be documented at all. Add infrastructure
to the web/api generator and add VIR_DEPRECATED and VIR_EXPORT_VAR as
macros we should not document.
No online docs are build from it since it doesn't really fit into our
document structure and new page will need to be created for it, but this
is at least a heads-up commit for easier parsing in order to build some
documentation (or python bindings) later on.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
If a macro has a string value, the @string attribute will contain the
value. Otherwise @string attribute will be missing.
For example, the following macro definition from libvirt-domain.h:
/**
* VIR_MIGRATE_PARAM_URI:
* ...
*/
# define VIR_MIGRATE_PARAM_URI "migrate_uri"
will result in
<macro name='VIR_MIGRATE_PARAM_URI' file='libvirt-domain' string='migrate_uri'>
<info><![CDATA[...]]></info>
</macro>
https://bugzilla.redhat.com/show_bug.cgi?id=1229199
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The apibuild.py script did not handle whitespace in preprocessor
macros, so it failed to detect constants declared with '# define'
instead of '#define'. Since we now correctly indent our public
header files, we have silently lost all constants from
libvirt-api.xml. This also caused us to not detect formatting
errors in constant docs
