Jiri Denemark [Thu, 11 Aug 2011 13:47:02 +0000 (15:47 +0200)]
qemu: Use fd: protocol for migration
By opening a connection to remote qemu process ourselves and passing the
socket to qemu we get much better errors than just "migration failed"
when the connection is opened by qemu.
Jiri Denemark [Thu, 11 Aug 2011 12:36:04 +0000 (14:36 +0200)]
qemu: Refactor do{Tunnel,Native}Migrate functions
The core of these two functions is very similar and most of it is even
exactly the same. Factor out the core functionality into a separate
function to remove code duplication and make further changes easier.
Eric Blake [Fri, 12 Aug 2011 21:54:49 +0000 (15:54 -0600)]
build: fix recent build failures
With gcc 4.5.1:
util/virpidfile.c: In function 'virPidFileAcquirePath':
util/virpidfile.c:308:66: error: nested extern declaration of '_gl_verify_function2' [-Wnested-externs]
Then in tests/commandtest.c, the new virPidFile APIs need to be used.
* src/util/virpidfile.c (virPidFileAcquirePath): Move verify to
top level.
* tests/commandtest.c: Use new pid APIs.
Add some APIs which use locking for crashsafe pidfile handling
In daemons using pidfiles to protect against concurrent
execution there is a possibility that a crash may leave a stale
pidfile on disk, which then prevents later restart of the daemon.
To avoid this problem, introduce a pair of APIs which make
use of virFileLock to ensure crash-safe & race condition-safe
pidfile acquisition & releae
* src/libvirt_private.syms, src/util/virpidfile.c,
src/util/virpidfile.h: Add virPidFileAcquire and virPidFileRelease
Introduce functions for checking whether a pidfile is valid
In some cases the caller of virPidFileRead might like extra checks
to determine whether the pid just read is really the one they are
expecting. This adds virPidFileReadIfAlive which will check whether
the pid is still alive with kill(0, -1), and (on linux only) will
look at /proc/$PID/path
* libvirt_private.syms, util/virpidfile.c, util/virpidfile.h: Add
virPidFileReadIfValid and virPidFileReadPathIfValid
* network/bridge_driver.c: Use new APIs to check PID validity
The functions for manipulating pidfiles are in util/util.{c,h}.
We will shortly be adding some further pidfile related functions.
To avoid further growing util.c, this moves the pidfile related
functions into a dedicated virpidfile.{c,h}. The functions are
also all renamed to have 'virPidFile' as their name prefix
* util/util.h, util/util.c: Remove all pidfile code
* util/virpidfile.c, util/virpidfile.h: Add new APIs for pidfile
handling.
* lxc/lxc_controller.c, lxc/lxc_driver.c, network/bridge_driver.c,
qemu/qemu_process.c: Add virpidfile.h include and adapt for API
renames
Eric Blake [Thu, 11 Aug 2011 21:44:05 +0000 (15:44 -0600)]
vbox, xenapi: add virDomainUndefineFlags
We forgot to add virDomainUndefineFlags for a couple of hypervisors.
This wires up trivial versions (since neither hypervisor supports
managed save yet, they do not need to support any flags).
Eric Blake [Thu, 11 Aug 2011 22:48:00 +0000 (16:48 -0600)]
virsh: don't reject undefine on active domain
The public API documents that undefine may be used to transition a
running persistent domain into a transient one. Many drivers still
do not support this usage, but virsh shouldn't be getting in the
way of those that do support it.
This also drops a redundant conditional; vshCommandOptString
guaranteed that name was non-NULL.
* tools/virsh.c (cmdUndefine): Allow undefine on active domains;
the drivers may still reject it, but it is a valid API usage.
* tests/undefine (error): Fix the test to match.
Philipp Hahn [Thu, 11 Aug 2011 12:44:00 +0000 (14:44 +0200)]
Improve tokenizing of linkable terms
Currently only tabs and blanks are used for tokenizing the description,
which breaks when a term is at the end of a line or has () appended to
it.
1. Use also other white space characters such as new-lines and carriage
return for splitting.
2. Remove some common non-word characters from the token before lookup.
* remote.html.in: Remove obsolete notes about internals of the
RPC protocol
* internals/rpc.html.in: Extensive docs on RPC protocol/API
* sitemap.html.in: Add new page
Philipp Hahn [Thu, 11 Aug 2011 12:40:38 +0000 (14:40 +0200)]
Align table cells on top
When the description of an entry is too long and needs multiple lines,
all other table cells of the same row are currently vertically aligned
on center. Without row borders or different background colors for
alternating rows this is hard to read.
Change the style-sheet to align the table cells of a row on top.
Eric Blake [Wed, 10 Aug 2011 23:18:55 +0000 (17:18 -0600)]
virsh: add snapshot-parent
Down the road, I want to add virDomainSnapshotGetParent, and use
the new API rather than xml scraping; but this virsh command can
be implemented even without the new API.
* tools/virsh.c (cmdSnapshotParent): New command.
* tools/virsh.pod (snapshot-parent): Document it.
Eric Blake [Fri, 5 Aug 2011 15:10:18 +0000 (09:10 -0600)]
qemu: silence clang false positive
Our logic throws off analyzer tools:
ptr var = NULL;
if (flags == 0) flags = live ? _LIVE : _CONFIG;
if (flags & _LIVE) do stuff
if (flags & _CONFIG) var = non-null;
if (flags & _LIVE) do more stuff
else if (flags & _CONFIG) use var
the tools keep thinking that var can still be NULL in the last
if clause, adding the hint shuts them up.
* src/qemu/qemu_driver.c (qemuDomainSetBlkioParameters): Add a
static analysis hint.
Laine Stump [Thu, 11 Aug 2011 03:28:05 +0000 (23:28 -0400)]
network: eliminate potential memory leak on parse failure
While the first encountered dns host record is being parsed, it's
possible for virNetworkDef::hosts to point to memory that has been
allocated, but virNetworkDef::nhosts to still be 0. If there is a
failure during that time, virNetworkDef::hosts will be leaked.
Although this isn't currently the case for virNetworkDef::txtrecords,
it could become that way through future re-factoring, and it hurts
nothing to restructure the freeing of txtrecord data to match that of
hosts data.
qemu can cope with everything omitting except the connection port, which
seems to also be the intent of domain_conf validation, so let's not
generate bogus command lines for that case.
The defaults are empty strings for addresses and 0 for the localport
Additionally, tweak the qemu cli parsing to handle omitted host
parameters
for -serial udp
Laine Stump [Thu, 11 Aug 2011 04:19:11 +0000 (00:19 -0400)]
docs: use IPv6 addresses in range reserved for documentation
Someone in an IRC channel or an email pointed out a few days ago that
the examples of IPv6 addresses in the libvirt documentation were not
in the officially reserved "documentation" range. This addresses their
concern.
Eric Blake [Wed, 10 Aug 2011 03:10:25 +0000 (21:10 -0600)]
virsh: add virsh snapshot-current --name
Sometimes, full XML is too much; since most snapshot commands
operate on a snapshot name, there should be an easy way to get
at the current snapshot's name. For example:
virsh snapshot-revert dom `virsh snapshot-current dom --name`
* tools/virsh.c (cmdSnapshotCurrent): Add an option.
* tools/virsh.pod (snapshot-current): Document it.
Eric Blake [Wed, 10 Aug 2011 14:51:36 +0000 (08:51 -0600)]
managedsave: prohibit use on transient domains
Transient domains reject attempts to set autostart, and using
virDomainCreate to restart a domain only works on persistent
domains. Therefore, managed save makes no sense on transient
domains, and should be rejected up front rather than creating
an otherwise unrecoverable managed save file.
Besides, transient domains imply that a lot more management is
being done by the upper layer; this includes the assumption
that the upper layer is okay managing the saved state file
created by virDomainSave, and does not need to use managed save.
* src/libvirt.c: Document that transient domains are incompatible
with managed save.
* src/qemu/qemu_driver.c (qemuDomainManagedSave): Enforce it.
* src/libxl/libxl_driver.c (libxlDomainManagedSave): Likewise.
Laine Stump [Wed, 10 Aug 2011 05:41:19 +0000 (01:41 -0400)]
docs: describe new virtual switch configuration in network XML docs
This should have been done with the rest of the patch for virtual
switch / network device abstraction. If documents the new elements
(and new usage of existing elements) in the <network> XML to support
libvirt networks that use existing host bridges and macvtap direct
connections, as well as the new <portgroup> element.
Philipp Hahn [Tue, 9 Aug 2011 13:47:57 +0000 (15:47 +0200)]
Fix memory leak while scanning snapshots
If a snapshot with the name already exists, virDomainSnapshotAssignDef()
just returns NULL, in which case the snapshot definition is leaked.
Currently this leak is not a big problem, since qemuDomainSnapshotLoad()
is only called once during initial startup of libvirtd.
Allow use of file images for LXC container filesystems
A previous commit gave the LXC driver the ability to mount
block devices for the container filesystem. Through use of
the loopback device functionality, we can build on this to
support use of plain file images for LXC filesytems.
By setting the LO_FLAGS_AUTOCLEAR flag we can ensure that
the loop device automatically disappears when the container
dies / shuts down
* src/lxc/lxc_container.c: Raise error if we see a file
based filesystem, since it should have been turned into
a loopback device already
* src/lxc/lxc_controller.c: Rewrite any filesystems of
type=file, into type=block, by binding the file image
to a free loop device
Currently the LXC driver can only populate filesystems from
host filesystems, using bind mounts. This patch allows host
block devices to be mounted. It autodetects the filesystem
format at mount time, and adds the block device to the cgroups
ACL. Example usage is
Eric Blake [Thu, 4 Aug 2011 20:07:58 +0000 (14:07 -0600)]
qemu: avoid crash on process attach
Detected by ccc-analyzer, reported by Alex Jia.
qemuProcessStart always calls qemuProcessWaitForMonitor with a
non-negative position, but qemuProcessAttach always calls with -1.
In the latter case, there is no log file we can scrape, so we
also should not be trying to scrape the logs if the qemu process
died at the very end.
* src/qemu/qemu_process.c (qemuProcessWaitForMonitor): Don't try
to read from log in qemuProcessAttach case.
Laine Stump [Wed, 3 Aug 2011 19:33:24 +0000 (15:33 -0400)]
network: eliminate lag in updating dnsmasq hosts files
This addresses https://bugzilla.redhat.com/show_bug.cgi?id=713728
When "defining" a new network (or one that exists but isn't currently
active) the new definition is stored in network->def, but for a
network that already exists and is active, the new definition is
stored in network->newDef, and then moved over to network->def as soon
as the network is destroyed.
However, the code that writes the dhcp and dns hosts files used by
dnsmasq was always using network->def for its information, even when
the new data was actually in network->newDef, so the hosts files
always lagged one edit behind the definition.
This patch changes the code to keep the pointer to the new definition
after it's been assigned into the network, and use it directly
(regardless of whether it's stored in network->newDef or network->def)
to construct the hosts files.
Guannan Ren [Thu, 4 Aug 2011 13:27:52 +0000 (21:27 +0800)]
rpc:fix sasl session relocking intead of unlocking it
When trying to use any SASL authentication for TCP sockets by
setting auth_tls = "sasl" in libvirtd.conf on server side, the
client will hang because of the sasl session relocking other than
dropping the lock when exiting virNetSASLSessionExtKeySize()
* src/rpc/virnetsaslcontext.c: virNetSASLSessionExtKeySize drop the
lock on exit
Osier Yang [Thu, 4 Aug 2011 08:54:58 +0000 (16:54 +0800)]
daemon: Unlink unix socket paths on shutdown
This patch introduces a internal RPC API "virNetServerClose", which
is standalone with "virNetServerFree". it closes all the socket fds,
and unlinks the unix socket paths, regardless of whether the socket
is still referenced or not.
This is to address regression bug:
https://bugzilla.redhat.com/show_bug.cgi?id=725702
Eric Blake [Wed, 3 Aug 2011 17:07:00 +0000 (11:07 -0600)]
build: update to latest gnulib
I noticed that with 0.9.4, gnulib ended up replacing pthread_sigmask
on glibc, even though glibc's works perfectly fine. It turns out
to have been an upstream gnulib bug.
* .gnulib: Update to latest, for pthread_sigmask fix.
Matthias Bolte [Wed, 3 Aug 2011 16:23:21 +0000 (18:23 +0200)]
Fix detection of GnuTLS 1.x.y
Detection based on gnutls_session doesn't work because GnuTLS 2.x.y
comes with a compat.h that defines gnutls_session to gnutls_session_t.
Instead detect this based on LIBGNUTLS_VERSION_MAJOR. Move this from
configure/config.h to gnutls_1_0_compat.h and make sure that all users
include gnutls_1_0_compat.h properly.
Daniel Veillard [Wed, 3 Aug 2011 03:02:42 +0000 (11:02 +0800)]
Release of libvirt-0.9.4
* configure.ac docs/news.html.in libvirt.spec.in: updates for new
release
* po/*.po*: pulled translations from the transifex teams and regenerated
localizations
Eric Blake [Tue, 2 Aug 2011 22:21:37 +0000 (16:21 -0600)]
util: plug memory leak
Leak detected by Coverity; only possible on unlikely ptsname_r
failure. Additionally, the man page for ptsname_r states that
failure is merely non-zero, not necessarily -1.
* src/util/util.c (virFileOpenTtyAt): Avoid leak on ptsname_r
failure.
Eric Blake [Tue, 2 Aug 2011 22:08:05 +0000 (16:08 -0600)]
interface: drop dead code
Coverity detected that ifaceGetNthParent had already dereferenced
'nth' prior to the conditional; all callers already complied with
passing a non-NULL pointer so make this part of the contract.
Eric Blake [Tue, 2 Aug 2011 20:26:17 +0000 (14:26 -0600)]
build: silence coverity false positives
Coverity complained that 395 out of 409 virAsprintf calls are
checked, and therefore assumed that the remaining cases are bugs
waiting to happen. But in each of these cases, a failed virAsprintf
will properly set the target string to NULL, and pass on that
failure to the caller, without wasting efforts to check the call.
Adding the ignore_value silences Coverity.
* src/conf/domain_audit.c (virDomainAuditGetRdev): Ignore
virAsprintf return value, when it behaves like we need.
* src/network/bridge_driver.c (networkDnsmasqLeaseFileNameDefault)
(networkRadvdConfigFileName, networkBridgeDummyNicName)
(networkRadvdPidfileBasename): Likewise.
* src/util/storage_file.c (absolutePathFromBaseFile): Likewise.
* src/openvz/openvz_driver.c (openvzGenerateContainerVethName):
Likewise.
* src/util/command.c (virCommandTranslateStatus): Likewise.
Eric Blake [Tue, 2 Aug 2011 20:07:25 +0000 (14:07 -0600)]
qemu: avoid memory leaks
Quite a few leaks detected by coverity. For chr, the leaks were
close enough to the allocations to plug in place; for disk, the
leaks were separated from the allocation by enough other lines with
intermediate failure cases that I refactored the cleanup instead.
Eric Blake [Tue, 2 Aug 2011 19:17:04 +0000 (13:17 -0600)]
qemu: avoid null deref on block pull error
Coverity detected that 5 of 6 callers of virJSONValueArrayGet checked
for a NULL return; and that by not checking we risk a null deref
during an error. The error is unlikely since the prior call to
virJSONValueArraySize would probably have already caught any botched
JSON array parse, but better safe than sorry.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONGetBlockJobInfo):
Check for NULL.
(qemuMonitorJSONExtractPtyPaths): Fix typo.
Eric Blake [Tue, 2 Aug 2011 18:25:58 +0000 (12:25 -0600)]
build: allow caching the input to STATIC_ANALYSIS
Right now, every re-run of configure re-evaluates whether a
static analysis tool is in use. But if you run configure under
coverity, make a tweak, and then do an incremental rebuild with
gcc but not coverity to test the tweak, then rerun a build under
coverity, then configure does not get rerun, and static analysis
ends up with lots of false positives.
This patch caches the static analysis result, and also makes it
easier to force static analysis even if the existing checks are
insufficient to detect newer versions of the static analyzer tools.
* configure.ac (lv_cv_static_analysis): New cache variable.
Eric Blake [Tue, 2 Aug 2011 17:19:53 +0000 (11:19 -0600)]
fdstream: drop delete argument
Revert 6a1f5f568f8. Now that libvirt_iohelper takes fds by
inheritance rather than by open() (commit 1eb66479), there is
no longer a race where the parent can unlink() a file prior to
the iohelper open()ing the same file. From there, it makes
more sense to have the callers both create and unlink, rather
than the caller create and the stream unlink, since the latter
was only needed when iohelper had to do the unlink.
* src/fdstream.h (virFDStreamOpenFile, virFDStreamCreateFile):
Callers are responsible for deletion.
* src/fdstream.c (virFDStreamOpenFileInternal): Don't leak created
file on failure.
(virFDStreamOpenFile, virFDStreamCreateFile): Drop parameter.
* src/lxc/lxc_driver.c (lxcDomainOpenConsole): Update callers.
* src/qemu/qemu_driver.c (qemuDomainScreenshot)
(qemuDomainOpenConsole): Likewise.
* src/storage/storage_driver.c (storageVolumeDownload)
(storageVolumeUpload): Likewise.
* src/uml/uml_driver.c (umlDomainOpenConsole): Likewise.
* src/vbox/vbox_tmpl.c (vboxDomainScreenshot): Likewise.
* src/xen/xen_driver.c (xenUnifiedDomainOpenConsole): Likewise.
Eric Blake [Tue, 2 Aug 2011 16:58:21 +0000 (10:58 -0600)]
screenshot: don't unlink bogus file
The previous qemu patch could end up calling unlink(tmp) before
tmp was the name of a valid file (unlinking a fileXXXXXX template
instead), or calling unlink(tmp) twice on success (once here,
and once at the end of the stream). Meanwhile, vbox also suffered
from the same leaked tmp file bug.
* src/qemu/qemu_driver.c (qemuDomainScreenshot): Don't unlink on
success, or on invalid name.
* src/vbox/vbox_tmpl.c (vboxDomainScreenshot): Don't leak temp file.
Eric Blake [Tue, 2 Aug 2011 15:56:10 +0000 (09:56 -0600)]
rpc: avoid uninitialized memory use
Spotted by Coverity. Gnutls documents that buffer must be NULL
if gnutls_x509_crt_get_key_purpose_oid is to be used to determine
the correct size needed for allocating a buffer.
Eric Blake [Mon, 1 Aug 2011 19:41:38 +0000 (13:41 -0600)]
rpc: avoid libvirtd crash on unexpected client close
Steps to reproduce this problem (vm1 is not running):
for i in `seq 50`; do virsh managedsave vm1& done; killall virsh
Pre-patch, virNetServerClientClose could end up setting client->sock
to NULL prior to other cleanup functions trying to use client->sock.
This fixes things by checking for NULL in more places, and by deferring
the cleanup until after all queued messages have been served.
* src/rpc/virnetserverclient.c (virNetServerClientRegisterEvent)
(virNetServerClientGetFD, virNetServerClientIsSecure)
(virNetServerClientLocalAddrString)
(virNetServerClientRemoteAddrString): Check for closed socket.
(virNetServerClientClose): Rearrange close sequence.
Analysis from Wen Congyang.
openvz: detect when a domain was shut down from the inside
This patch adds an internal function openvzGetVEStatus to
get the real state of the domain. This function is used in
various places in the driver, in particular to detect when
the domain has been shut down by the user with the "halt"
command.
Eric Blake [Thu, 28 Jul 2011 23:18:24 +0000 (17:18 -0600)]
qemu: fix crash when mixing sync and async monitor jobs
Currently, we attempt to run sync job and async job at the same time. It
means that the monitor commands for two jobs can be run in any order.
In the function qemuDomainObjEnterMonitorInternal():
if (priv->job.active == QEMU_JOB_NONE && priv->job.asyncJob) {
if (qemuDomainObjBeginNestedJob(driver, obj) < 0)
We check whether the caller is an async job by priv->job.active and
priv->job.asynJob. But when an async job is running, and a sync job is
also running at the time of the check, then priv->job.active is not
QEMU_JOB_NONE. So we cannot check whether the caller is an async job
in the function qemuDomainObjEnterMonitorInternal(), and must instead
put the burden on the caller to tell us when an async command wants
to do a nested job.
Once the burden is on the caller, then only async monitor enters need
to worry about whether the VM is still running; for sync monitor enter,
the internal return is always 0, so lots of ignore_value can be dropped.
Alex Jia [Mon, 1 Aug 2011 15:45:27 +0000 (23:45 +0800)]
qemu: fix return value issue
whether or not previous return value is -1, the following codes will be
executed for a inactive guest in src/qemu/qemu_driver.c:
ret = virDomainSaveConfig(driver->configDir, persistentDef);
and if everything is okay, 'ret' is assigned to 0, the previous 'ret'
will be overwritten, this patch will fix this issue.
* src/qemu/qemu_driver.c: avoid return value is overwritten when give a argument
in out of blkio weight range for a inactive guest.
* how to reproduce?
% virsh blkiotune ${guestname} --weight 10
% echo $?
Note: guest must be inactive, argument 10 in out of blkio weight range,
and can get a error information by checking libvirtd.log, however,
virsh hasn't raised any error information, and return value is 0.
Alex Jia [Mon, 1 Aug 2011 15:06:07 +0000 (23:06 +0800)]
qemu: fix return value issue in qemuDomainSetMemoryParameters
whether or not previous return value is -1, the following codes will be
executed for a inactive guest in qemuDomainSetMemoryParameters:
ret = virDomainSaveConfig(driver->configDir, persistentDef);
and if everything is okay, 'ret' is assigned to 0, the previous 'ret'
will be overwritten, this patch will fix this issue.
* src/qemu/qemu_driver.c: avoid return value is overwritten when set
min_guarante value to a inactive guest.
* how to reproduce?
% virsh memtune ${guestname} --min_guarante 1024
% echo $?
Note: guest must be inactive, in fact, 'min_guarante' hasn't been implemented
in memory tunable, and I can get the error when check actual libvirtd.log,
however, virsh hasn't raised any error information, and return value is 0.
Matthias Bolte [Mon, 1 Aug 2011 12:42:06 +0000 (14:42 +0200)]
virsh: Fix vol-name and vol-pool commands
This commands don't have a --pool option, so don't tell
vshCommandOptVolBy that there could be one. This made
vshCommandOptString for pooloptname fail and an "missing option"
error was reported.
Osier Yang [Mon, 1 Aug 2011 11:41:07 +0000 (19:41 +0800)]
qemu: Fix a regression of domjobabort
Introduced by f9a837da73a11ef, the condition is not changed after
the else clause is removed. So now it quit with "domain is not
running" when the domain is running. However, when the domain is
not running, it reports "no job is active".
How to reproduce:
1)
% virsh start $domain
% virsh domjobabort $domain
error: Requested operation is not valid: domain is not running
2)
% virsh destroy $domain
% virsh domjobabort $domain
error: Requested operation is not valid: no job is active on the domain
3)
% virsh save $domain /tmp/$domain.save
Before above commands finished, try to abort job in another terminal
% virsh domabortjob $domain
error: Requested operation is not valid: domain is not running
Eric Blake [Fri, 22 Jul 2011 03:37:33 +0000 (21:37 -0600)]
save: generate idempotent inactive xml for running domain
Originally noticed by comparing the xml generated by virDomainSave
with the xml produced by reparsing and redumping that xml, but I
also did an audit of every last use of VIR_DOMAIN_XML_INACTIVE in
domain_conf.c to ensure that no other discrepancies exist.
* src/conf/domain_conf.c (virDomainDeviceInfoIsSet): Add
parameter, and update all callers. Make static.
(virDomainNetDefFormat): Skip generated ifname.
(virDomainDefFormatInternal): Skip default <seclabel>.
(virDomainChrSourceDefParseXML): Skip generated pty path, and add
parameter. Update callers.
* src/conf/domain_conf.h (virDomainDeviceInfoIsSet): Delete.
* src/libvirt_private.syms (domain_conf.h): Update.
Eric Blake [Fri, 29 Jul 2011 15:36:17 +0000 (09:36 -0600)]
conf: make 'vnet' prefix a macro
Using a macro ensures that all the code is looking for the same
prefix.
* src/conf/domain_conf.h (VIR_NET_GENERATED_PREFIX): New macro.
* src/conf/domain_conf.c (virDomainNetDefParseXML): Use it.
* src/uml/uml_conf.c (umlConnectTapDevice): Likewise.
* src/qemu/qemu_command.c (qemuNetworkIfaceConnect): Likewise.
Suggested by Laine Stump.
which points out that a guest on an "isolated" network could
potentially exploit the DNS forwarding provided by dnsmasq to create a
communication channel to the outside.
This patch eliminates that possibility by adding the "--no-resolv"
argument to the dnsmasq commandline, which tells dnsmasq to not
forward on any requests that it can't resolve itself (by looking at
its own static hosts files and runtime list of dhcp clients), but to
instead return a failure for those requests.
This shouldn't cause any undesirable change from current
behavior, even in the case where a guest is currently configured with
multiple interfaces, one of them being connected to an isolated
network, and another to a network that does have connectivity to the
outside. If the isolated network's DNS server is queried for a name
it doesn't know, it will return "Refused" rather than "Unknown", which
indicates to the guest that it should query other servers, so it then
queries the connected DNS server, and gets the desired response.
Eric Blake [Fri, 29 Jul 2011 19:16:29 +0000 (13:16 -0600)]
build: fix include path for cygwin
Without this, cygwin failed to compile:
In file included from ../src/rpc/virnetmessage.h:24,
from ../src/rpc/virnetclient.h:27,
from remote/remote_driver.c:31:
../src/rpc/virnetprotocol.h:9:21: error: rpc/rpc.h: No such file or directory
With that fixed, compilation warned:
rpc/virnetsocket.c: In function 'virNetSocketNewListenUNIX':
rpc/virnetsocket.c:347: warning: format '%d' expects type 'int', but argument 8 has type 'gid_t' [-Wformat]
rpc/virnetsocket.c: In function 'virNetSocketGetLocalIdentity':
rpc/virnetsocket.c:743: warning: pointer targets in passing argument 5 of 'getsockopt' differ in signedness
* src/Makefile.am (libvirt_driver_remote_la_CFLAGS)
(libvirt_net_rpc_client_la_CFLAGS)
(libvirt_net_rpc_server_la_CFLAGS): Include XDR_CFLAGS, for rpc
headers on cygwin.
* src/rpc/virnetsocket.c (virNetSocketNewListenUNIX)
(virNetSocketGetLocalIdentity): Avoid compiler warnings.
Eric Blake [Fri, 29 Jul 2011 14:52:27 +0000 (08:52 -0600)]
build: avoid non-portable shell in test setup
POSIX states that 'a=1; a=2 b=$a command' has unspecified results
for the value of $b visible within command. In particular, on
BSD, this resulted in PATH not picking up the in-test ssh.
* tests/Makefile.am (lv_abs_top_builddir): New macro.
(path_add, TESTS_ENVIRONMENT): Use it to avoid referring to an
environment variable set previously within the same command line.
Reported by Matthias Bolte.
Osier Yang [Fri, 29 Jul 2011 14:40:47 +0000 (22:40 +0800)]
utils: More useful error message for hook script failure
Commit 3709a386 ported hooks codes to new command execution API,
together with the useful error message removed. Though we can't
get "errbuf" from the new command execution API anymore, still
we can give a more useful error.
freebsd: Fix build problem due to picking up the wrong libvirt.h
Gettext annoyingly modifies CPPFLAGS in-place, putting
-I/usr/local/include into the search patch if libintl headers
must be used from that location. But since we must support
automake 1.9.6 which lacks AM_CPPFLAGS, and since CPPFLAGS is used
prior to INCLUDES, this means that the build picks up the _old_
installed libvirt.h in priority to the in-tree version, leading
to all sorts of weird build failures on FreeBSD.
Fix this by teaching configure to undo gettext's actions, but
to keep any changes required by gettext at the end of INCLUDES
after all in-tree locations are used first. Also requires
adding a wrapper Makefile.am and making gnulib-tool create
just gnulib.mk files during the bootstrap process.
Eric Blake [Fri, 22 Jul 2011 03:31:46 +0000 (21:31 -0600)]
save: let qemu driver manipulate save files
The goal here is that save-image-dumpxml fed back to
save-image-define should not change the save file; anywhere that
this is not the case is probably a bug in domain_conf.c.
Eric Blake [Mon, 18 Jul 2011 23:27:59 +0000 (17:27 -0600)]
save: support qemu modifying xml on domain save/restore
With this, it is possible to update the path to a disk backing
image on either the save or restore action, without having to
binary edit the XML embedded in the state file.
This also modifies virDomainSave to output a smaller xml (only
the inactive xml, which is all the more virDomainRestore parses),
while still guaranteeing padding for most typical abi-compatible
xml replacements, necessary so that the next patch for
virDomainSaveImageDefineXML will not cause unnecessary
modifications to the save image file.
* src/qemu/qemu_driver.c (qemuDomainSaveInternal): Add parameter,
only use inactive state, and guarantee padding.
(qemuDomainSaveImageOpen): Add parameter.
(qemuDomainSaveFlags, qemuDomainManagedSave)
(qemuDomainRestoreFlags, qemuDomainObjRestore): Update callers.
Eric Blake [Thu, 21 Jul 2011 21:11:32 +0000 (15:11 -0600)]
xen: make direct call when there is only one subdriver
No need to use a for loop if we know there is exactly one client.
Found by:
for f in $(sed -n 's/.*Drv[^ ]* \([^;]*\);.*/\1/p' src/xen/xen_driver.h)
do
git grep "\(\.\|->\)$f\b" src/xen
done | cat
and looking through the resulting list to see which callback struct
members are used exactly once. The next patch will ensure that we
don't reintroduce uses of these callbacks.
* src/xen/xen_driver.c (xenUnifiedClose): Call close
unconditionally, to match xenUnifiedOpen.
(xenUnifiedNodeGetInfo, xenUnifiedDomainCreateXML)
(xenUnifiedDomainSave, xenUnifiedDomainRestore)
(xenUnifiedDomainCoreDump, xenUnifiedDomainUpdateDeviceFlags):
Make direct call to lone implementation.
* src/xen/xend_internal.h (xenDaemonDomainCoreDump)
(xenDaemonUpdateDeviceFlags, xenDaemonCreateXML): Add prototypes.
* src/xen/xend_internal.c (xenDaemonDomainCoreDump)
(xenDaemonUpdateDeviceFlags, xenDaemonCreateXML): Export.