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95f8e3237e
We've been doing a terrible job of performing XML validation in our
various API that parse XML with a corresponding schema (we started
with domains back in commit dd69a14f, v1.2.12, but didn't catch all
domain-related APIs, didn't document the use of the flag, and didn't
cover other XML). New APIs (like checkpoints) should do the validation
unconditionally, but it doesn't hurt to continue retrofitting existing
APIs to at least allow the option.
While there are many APIs that could be improved, this patch focuses
on wiring up a new snapshot XML creation flag through all the
hypervisors that support snapshots, as well as exposing it in 'virsh
snapshot-create'. For 'virsh snapshot-create-as', we blindly set the
flag without a command-line option, since the XML we create from the
command line should generally always comply (note that validation
might cause failures where it used to succeed, such as if we tighten
the RNG to reject a name of '../\n'); but blindly passing the flag
means we also have to add in fallback code to disable validation if
the server is too old to understand the flag.
Signed-off-by: Eric Blake <eblake@redhat.com>
Acked-by: Peter Krempa <pkrempa@redhat.com>
224 lines
11 KiB
C
224 lines
11 KiB
C
/*
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* libvirt-domain-snapshot.h
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* Summary: APIs for management of domain snapshots
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* Description: Provides APIs for the management of domain snapshots
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*
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* Copyright (C) 2006-2014 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#ifndef LIBVIRT_DOMAIN_SNAPSHOT_H
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# define LIBVIRT_DOMAIN_SNAPSHOT_H
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# ifndef __VIR_LIBVIRT_H_INCLUDES__
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# error "Don't include this file directly, only use libvirt/libvirt.h"
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# endif
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/**
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* virDomainSnapshot:
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*
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* A virDomainSnapshot is a private structure representing a snapshot of
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* a domain. A snapshot captures the state of the domain at a point in
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* time, with the intent that the guest can be reverted back to that
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* state at a later time.
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*/
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typedef struct _virDomainSnapshot virDomainSnapshot;
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/**
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* virDomainSnapshotPtr:
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*
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* A virDomainSnapshotPtr is pointer to a virDomainSnapshot private structure,
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* and is the type used to reference a domain snapshot in the API.
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*/
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typedef virDomainSnapshot *virDomainSnapshotPtr;
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const char *virDomainSnapshotGetName(virDomainSnapshotPtr snapshot);
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virDomainPtr virDomainSnapshotGetDomain(virDomainSnapshotPtr snapshot);
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virConnectPtr virDomainSnapshotGetConnect(virDomainSnapshotPtr snapshot);
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typedef enum {
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VIR_DOMAIN_SNAPSHOT_CREATE_REDEFINE = (1 << 0), /* Restore or alter
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metadata */
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VIR_DOMAIN_SNAPSHOT_CREATE_CURRENT = (1 << 1), /* With redefine, make
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snapshot current */
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VIR_DOMAIN_SNAPSHOT_CREATE_NO_METADATA = (1 << 2), /* Make snapshot without
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remembering it */
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VIR_DOMAIN_SNAPSHOT_CREATE_HALT = (1 << 3), /* Stop running guest
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after snapshot */
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VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY = (1 << 4), /* disk snapshot, not
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full system */
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VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT = (1 << 5), /* reuse any existing
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external files */
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VIR_DOMAIN_SNAPSHOT_CREATE_QUIESCE = (1 << 6), /* use guest agent to
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quiesce all mounted
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file systems within
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the domain */
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VIR_DOMAIN_SNAPSHOT_CREATE_ATOMIC = (1 << 7), /* atomically avoid
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partial changes */
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VIR_DOMAIN_SNAPSHOT_CREATE_LIVE = (1 << 8), /* create the snapshot
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while the guest is
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running */
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VIR_DOMAIN_SNAPSHOT_CREATE_VALIDATE = (1 << 9), /* validate the XML
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against the schema */
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} virDomainSnapshotCreateFlags;
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/* Take a snapshot of the current VM state */
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virDomainSnapshotPtr virDomainSnapshotCreateXML(virDomainPtr domain,
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const char *xmlDesc,
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unsigned int flags);
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typedef enum {
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VIR_DOMAIN_SNAPSHOT_XML_SECURE = VIR_DOMAIN_XML_SECURE, /* dump security sensitive information too */
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} virDomainSnapshotXMLFlags;
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/* Dump the XML of a snapshot */
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char *virDomainSnapshotGetXMLDesc(virDomainSnapshotPtr snapshot,
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unsigned int flags);
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/**
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* virDomainSnapshotListFlags:
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*
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* Flags valid for virDomainSnapshotNum(),
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* virDomainSnapshotListNames(), virDomainSnapshotNumChildren(), and
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* virDomainSnapshotListChildrenNames(), virDomainListAllSnapshots(),
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* and virDomainSnapshotListAllChildren(). Note that the interpretation
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* of flag (1<<0) depends on which function it is passed to; but serves
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* to toggle the per-call default of whether the listing is shallow or
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* recursive. Remaining bits come in groups; if all bits from a group are
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* 0, then that group is not used to filter results. */
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typedef enum {
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VIR_DOMAIN_SNAPSHOT_LIST_ROOTS = (1 << 0), /* Filter by snapshots
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with no parents, when
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listing a domain */
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VIR_DOMAIN_SNAPSHOT_LIST_DESCENDANTS = (1 << 0), /* List all descendants,
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not just children, when
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listing a snapshot */
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/* For historical reasons, groups do not use contiguous bits. */
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VIR_DOMAIN_SNAPSHOT_LIST_LEAVES = (1 << 2), /* Filter by snapshots
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with no children */
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VIR_DOMAIN_SNAPSHOT_LIST_NO_LEAVES = (1 << 3), /* Filter by snapshots
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that have children */
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VIR_DOMAIN_SNAPSHOT_LIST_METADATA = (1 << 1), /* Filter by snapshots
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which have metadata */
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VIR_DOMAIN_SNAPSHOT_LIST_NO_METADATA = (1 << 4), /* Filter by snapshots
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with no metadata */
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VIR_DOMAIN_SNAPSHOT_LIST_INACTIVE = (1 << 5), /* Filter by snapshots
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taken while guest was
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shut off */
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VIR_DOMAIN_SNAPSHOT_LIST_ACTIVE = (1 << 6), /* Filter by snapshots
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taken while guest was
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active, and with
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memory state */
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VIR_DOMAIN_SNAPSHOT_LIST_DISK_ONLY = (1 << 7), /* Filter by snapshots
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taken while guest was
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active, but without
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memory state */
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VIR_DOMAIN_SNAPSHOT_LIST_INTERNAL = (1 << 8), /* Filter by snapshots
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stored internal to
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disk images */
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VIR_DOMAIN_SNAPSHOT_LIST_EXTERNAL = (1 << 9), /* Filter by snapshots
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that use files external
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to disk images */
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VIR_DOMAIN_SNAPSHOT_LIST_TOPOLOGICAL = (1 << 10), /* Ensure parents occur
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before children in
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the resulting list */
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} virDomainSnapshotListFlags;
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/* Return the number of snapshots for this domain */
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int virDomainSnapshotNum(virDomainPtr domain, unsigned int flags);
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/* Get the names of all snapshots for this domain */
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int virDomainSnapshotListNames(virDomainPtr domain, char **names, int nameslen,
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unsigned int flags);
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/* Get all snapshot objects for this domain */
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int virDomainListAllSnapshots(virDomainPtr domain,
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virDomainSnapshotPtr **snaps,
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unsigned int flags);
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/* Return the number of child snapshots for this snapshot */
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int virDomainSnapshotNumChildren(virDomainSnapshotPtr snapshot,
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unsigned int flags);
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/* Get the names of all child snapshots for this snapshot */
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int virDomainSnapshotListChildrenNames(virDomainSnapshotPtr snapshot,
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char **names, int nameslen,
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unsigned int flags);
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/* Get all snapshot object children for this snapshot */
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int virDomainSnapshotListAllChildren(virDomainSnapshotPtr snapshot,
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virDomainSnapshotPtr **snaps,
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unsigned int flags);
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/* Get a handle to a named snapshot */
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virDomainSnapshotPtr virDomainSnapshotLookupByName(virDomainPtr domain,
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const char *name,
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unsigned int flags);
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/* Check whether a domain has a snapshot which is currently used */
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int virDomainHasCurrentSnapshot(virDomainPtr domain, unsigned int flags);
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/* Get a handle to the current snapshot */
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virDomainSnapshotPtr virDomainSnapshotCurrent(virDomainPtr domain,
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unsigned int flags);
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/* Get a handle to the parent snapshot, if one exists */
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virDomainSnapshotPtr virDomainSnapshotGetParent(virDomainSnapshotPtr snapshot,
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unsigned int flags);
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/* Determine if a snapshot is the current snapshot of its domain. */
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int virDomainSnapshotIsCurrent(virDomainSnapshotPtr snapshot,
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unsigned int flags);
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/* Determine if a snapshot has associated libvirt metadata that would
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* prevent the deletion of its domain. */
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int virDomainSnapshotHasMetadata(virDomainSnapshotPtr snapshot,
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unsigned int flags);
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typedef enum {
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VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING = 1 << 0, /* Run after revert */
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VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED = 1 << 1, /* Pause after revert */
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VIR_DOMAIN_SNAPSHOT_REVERT_FORCE = 1 << 2, /* Allow risky reverts */
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} virDomainSnapshotRevertFlags;
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/* Revert the domain to a point-in-time snapshot. The
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* state of the guest after this call will be the state
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* of the guest when the snapshot in question was taken
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*/
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int virDomainRevertToSnapshot(virDomainSnapshotPtr snapshot,
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unsigned int flags);
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/* Delete a snapshot */
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typedef enum {
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VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN = (1 << 0), /* Also delete children */
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VIR_DOMAIN_SNAPSHOT_DELETE_METADATA_ONLY = (1 << 1), /* Delete just metadata */
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VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY = (1 << 2), /* Delete just children */
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} virDomainSnapshotDeleteFlags;
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int virDomainSnapshotDelete(virDomainSnapshotPtr snapshot,
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unsigned int flags);
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int virDomainSnapshotRef(virDomainSnapshotPtr snapshot);
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int virDomainSnapshotFree(virDomainSnapshotPtr snapshot);
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#endif /* LIBVIRT_DOMAIN_SNAPSHOT_H */
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