Separate the guest created QEMU monitor socket location
from the libvirtd create XML / PID data files, to improve
security separation when running QEMU non-root
* libvirt.spec.in: Leave /var/run/libvirt/qemu as root:root
* src/qemu_conf.h: Add libDir and cacheDir directory paths
* src/qemu_driver.c: Move QEMU monitor socket from
stateDir to libDir to avoid making security critical directory
accessible to QEMU guests.
* src/util.c: Delay running hook till after damonizing to
ensure pidfile is still written before changing UID/GID
If a file descriptor with events=0 was added to the libvirtd
event loop, it would still be added to the poll() fds' array.
While it wouldn't see any POLLIN/OUT events, it'd still get
triggered for HANGUP/ERROR events which was not in compliance
with the libvirt events API contract.
* qemud/event.c: Don't poll on FDs with events=0
* tests/eventtest.c: Add test case to validate fix to event.c
* python/libvir.c (libvirt_virConnectDomainEventCallback): Return 0
when successful, rather than always returning -1.
clang flagged this function for its dead-store of "ret=0".
Once "ret" was set to 0, it was never used, and
the function would always return -1.
* src/openvz_conf.c (openvzReadNetworkConf): Initialize "net".
Otherwise, upon openvzRead... failure, we would "goto error;"
where an uninitialized "net" could be dereferenced.
* src/test.c (testOpenVolumesForPool): Upon early virAsprintf or
virXPathNodeSet failure, "goto error" would take us to
virStorageVolDefFree(def), but with "def" not defined.
Initialize it to NULL.
* src/storage_backend.c: Include "internal.h".
(virStorageBackendCopyToFD): Mark inputvol parameter as "nonnull".
Remove test for non-NULL inputvol. Both callers ensure it's non-NULL.
* src/libvirt.c (virStoragePoolSetAutostart): Return -1 if the pool
argument is invalid, rather than "goto error" where we could dereference
that possibly-NULL "pool".
(virConnectFindStoragePoolSources): Likewise.
(virConnectNumOfDomains): Likewise.
Daniel P. Berrange spotted that the two latter functions
needed the same treatment.
* docs/schemas/domain.rng: Add <serial> element to disks
* src/domain_conf.h, src/domain_conf.c: XML parsing and
formatting for disk serial numbers
* src/qemu_conf.c: Set serial number when launching guests
* tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared.args,
tests/qemuxml2argvdata/qemuxml2argv-disk-drive-shared.xml: Add
serial number to XML test
Add option to domain XML for
<memoryBacking>
<hugepages/>
</memoryBacking>
* configure.in: Add check for mntent.h
* qemud/libvirtd_qemu.aug, qemud/test_libvirtd_qemu.aug, src/qemu.conf
Add 'hugetlbfs_mount' config parameter
* src/qemu_conf.c, src/qemu_conf.h: Check for -mem-path flag in QEMU,
and pass it when hugepages are requested.
Load hugetlbfs_mount config parameter, search for mount if not given.
* src/qemu_driver.c: Free hugetlbfs_mount/path parameter in driver shutdown.
Create directory for QEMU hugepage usage, chowning if required.
* docs/formatdomain.html.in: Document memoryBacking/hugepages elements
* docs/schemas/domain.rng: Add memoryBacking/hugepages elements to schema
* src/util.c, src/util.h, src/libvirt_private.syms: Add virFileFindMountPoint
helper API
* tests/qemuhelptest.c: Add -mem-path constants
* tests/qemuxml2argvtest.c, tests/qemuxml2xmltest.c: Add tests for hugepage
handling
* tests/qemuxml2argvdata/qemuxml2argv-hugepages.xml,
tests/qemuxml2argvdata/qemuxml2argv-hugepages.args: Data files for
hugepage tests
* tests/testutils.c: Run test function twice, once to prime it for
static allocations, once to count the non-static allocations.
* tests/testutilsqemu.c: Initialize variable correctl
* src/capabilities.c: Don't free machines variable upon failure
since caller must do that
* src/xm_internal.c: Add missing check for OOM in building VIF
config param
* docs/schemas/domain.rng: augment the video model with an optional
acceleration element with optional accel2d and accel3d flags
* src/domain_conf.c src/domain_conf.h: exten the virDomainVideoDef
structure with an optional accel field, virDomainVideoAccelDefParseXML
and virDomainVideoAccelDefFormat functions to parse and serialize
the structure.
Paolo Bonzini points out that in my refactoring of the code for
virDomainMigrate(), I added a check for the return value from
virDomainMigratePerform(). The problem is that we don't want to
exit if we fail, we actually want to go on and do
virDomainMigrateFinish2() with a non-0 return code to clean things
up. Remove the check.
While reproducing this issue, I also noticed that we wouldn't
always properly propagate an error message. In particular, I
found that if you blocked off the migration ports (with iptables)
and then tried the migration, it would actually fail but we would
get no failure output from Qemu. Therefore, we would think we
succeeded, and leave a huge mess behind us. Execute the monitor
command "info migrate", and look for a failure string in there
as well.
Signed-off-by: Chris Lalancette <clalance@redhat.com>
* src/esx/esx_util.c: esxUtil_ParseQuery() warns if a known query
parameter should be ignored due to the corresponding char/int pointer
being NULL, instead of silently ignoring it. Fix the control flow.
* src/esx/esx_vmx.c: add an extra type of addressType beside 'static'
and 'generated', 'vpx' indicates that the MAC address was generated
by a vCenter.
Calling qsort() on the disks array causes disk to be
unneccessarily re-ordered, potentially breaking the
ability to boot if the boot disk gets moved later in
the list. The new algorithm will insert a new disk as
far to the end of the list as possible, while being
ordered correctly wrt other disks on the same bus.
* src/domain_conf.c, src/domain_conf.h: Remove disk sorting
routines. Add API to insert a disk into existing list at
the optimal position, without resorting disks
* src/libvirt_private.syms: Export virDomainDiskInsert
* src/xend_internal.c, src/xm_internal.c: Remove calls to
qsort, use virDomainDiskInsert instead.
* src/qemu_driver.c: Remove calls to qsort, use virDoaminDiskInsert
instead. Fix reordering bugs when hotunplugging disks and
networks. Fix memory leak in disk/net unplug
* proxy/Makefile.am: Build storage_encryption_conf.c since its a
dependancy of domain_conf.c
* src/storage_encryption_conf.c: Disable XML parsing APis when
build under proxy
* src/test.c: Add a dummy no-op secrets driver for test suite
The if ((nlptr...)) implicitly assumes commptr != NULL (and that "buf"
starts with "cmd"). Make the assumption explicit, it will be broken in
a future patch.
* src/qemu_driver.c: Don't assume buffered monitor output echoes the
command.
The XML allows <encryption format='unencrypted'/>, this implementation
canonicalizes the internal representation so that "disk->encryption" is
non-NULL iff encryption information is available.
A domain with partial encryption information can be defined,
completeness of the information is not verified. The domain won't
start until the remaining information is added, of course.
* docs/formatdomain.html, docs/formatdomain.html.in: Document
new encryption options for disks
* docs/schemas/domain.rng: Pull in storage encryption schema
rules
* src/domain_conf.h, src/domain_conf.c: Wire up storage encryption
XML parsing/formatting APIs
Supports only virStorageVolCreateXML, not virStorageVolCreateXMLFrom.
Curiously, qemu-img does not need the passphrase for anything to create
an encrypted volume. This implementation thus does not need to touch
any secrets to work with cooperating clients. More generic passphrase
handling is added in the next patch.
* src/storage_backend.c: Request encryption when creating qcow/qcow2
files
* src/storage_backend_disk.c, src/storage_backend_fs.c,
src/storage_backend_logical.c: Refuse to create volumes with
encryption params set.
(The implementation is not very generic, but that can be very
easily rectified if/when new encryption formats appear.)
* src/storage_backend_fs.c: Probe for qcow/qcow2 encryption
algorithm field
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
Define an <encryption> tag specifying volume encryption format and
format-depenedent parameters (e.g. passphrase, cipher name, key
length, key).
Currently the only defined parameter is a reference to a "secret"
(passphrase/key) managed using the virSecret* API.
Only the qcow/qcow2 encryption format, and a "default" format used to
let libvirt choose the format during volume creation, is currently
supported.
This patch does not add any users; the <encryption> tag is added in
the following patches to both volumes (to support encrypted volume
creation) and domains.
* docs/*.html: Re-generate
* docs/formatstorageencryption.html.in, docs/sitemap.html.in:
Add page describing storage encryption data format
* docs/schemas/Makefile.am, docs/schemas/storageencryption.rng:
Add RNG schema for storage encryption format
* po/POTFILES.in: Add src/storage_encryption_conf.c
* src/libvirt_private.syms: Export virStorageEncryption* functions
* src/storage_encryption_conf.h, src/storage_encryption_conf.c: Internal
helper APIs for dealing with storage encryption format
* libvirt.spec.in, mingw32-libvirt.spec.in: Add storageencryption.rng
RNG schema
* include/libvirt/virterror.h, src/virterror.c: Add VIR_WAR_NO_SECRET
* src/libvirt_private.syms, src/datatypes.h, src/datatypes.c: Type
virSecret struct definition and helper APIs
* src/driver.h: Sub-driver API definitions for secrets
* src/libvirt.c: Define new sub-driver for secrets
This patch adds a "secret" as a separately managed object, using a
special-purpose API to transfer the secret values between nodes and
libvirt users.
* docs/schemas/secret.rng, docs/schemas/Makefilem.am: Add new
schema for virSecret objects
* docs/*html: Re-generated
* docs/formatsecret.html.in, docs/sitemap.html.in: Add page
describing the virSecret XML schema
* include/libvirt/libvirt.h.in: Define the new virSecret public
API
* src/libvirt_public.syms: Export symbols for new public APIs
* mingw32-libvirt.spec.in, libvirt.spec.in: Add secret.rng to
files list
Per prior discussion -- this was, indeed, trivial.
I'm a little disappointed to be breaking the ordering characteristics of
the enum (as it had been ordered by increasing time requirements and
decreasing output size), but breaking any save files with the old
constants in the headers would of course be worse.
>From 2a9cdcfc88de091a8d34aa3fc3b1208d7681790e Mon Sep 17 00:00:00 2001
From: Charles Duffy <Charles_Duffy@dell.com>
Date: Fri, 28 Aug 2009 11:49:54 -0500
Subject: [PATCH] support lzop save compression for qemu
One of the larger disincentives towards use of compression for migrated-out save
files is performance impact. This patch adds support for lzop; CPU time for
compression is about 5x faster than gzip (the next most performant algorithm)
and decompression is about 3x faster.
Signed-off-by: Charles Duffy <Charles_Duffy@dell.com>
Signed-off-by: Chris Lalancette <clalance@redhat.com>
