Pointing out these two error messages as unclear: "write save" sounds
like a typo without context, and lack of a colon made the second message
difficult to parse.
Eric Blake [Fri, 14 May 2010 20:50:27 +0000 (14:50 -0600)]
virFileResolveLink: fix return value
virFileResolveLink was returning a positive value on error,
thus confusing callers that assumed failure was < 0. The
confusion is further evidenced by callers that would have
ended up calling virReportSystemError with a negative value
instead of a valid errno.
Fixes Red Hat BZ #591363.
* src/util/util.c (virFileResolveLink): Live up to documentation.
* src/qemu/qemu_security_dac.c
(qemuSecurityDACRestoreSecurityFileLabel): Adjust callers.
* src/security/security_selinux.c
(SELinuxRestoreSecurityFileLabel): Likewise.
* src/storage/storage_backend_disk.c
(virStorageBackendDiskDeleteVol): Likewise.
Cole Robinson [Mon, 17 May 2010 16:32:45 +0000 (12:32 -0400)]
tests: Skip daemon-conf test if dir exceeds UNIX_PATH_MAX
The max path length for unix sockets is pretty small (108, see man 7 unix).
If 'make check' is run from a directory that exceeds this, one of the tests
will fail, and in such a way that requires manually editting the test to
determine why.
There are certainly other ways to handle this, but I've chosen just to skip
the offending test if we will exceed the length limitation.
v2: Drop bashism, use test infrastructure to warn and skip
Eric Blake [Sat, 15 May 2010 00:19:58 +0000 (18:19 -0600)]
build: fix cygwin build, correctly this time
Fix the cygwin regression introduced in commit 48445ccff, but
without repeating the fresh build regression of commit 2d550542e.
* src/Makefile.am (libvirt_test_la_LIBADD): Split out subset of
locally-built libraries...
(libvirt_test_la_BUILT_LIBADD): ...into new variable.
(libvirt_test_la_DEPENDENCIES): Depend only on the subset that
automake would have given us for free if we didn't have to add our
own extra file.
Eric Blake [Fri, 14 May 2010 22:45:52 +0000 (16:45 -0600)]
build: fix up some compiler flags
Matthias noted that the line:
virt_aa_helper_LDFLAGS = $(WARN_CFLAGS)
looks inconsistent, so I did an audit.
Currently, the set of compiler warning flags passed to gcc as $CC are
equally permitted as the set of linker flags passed to gcc as $LD, so
there was no problem with that usage. But if we ever get in a
situation where $CC and $LD treat particular flags differently, using
the right variable form will make it easier.
In the process, I spotted a couple of typos that were omitting useful
flags, as well as specifying a -l under the wrong variable.
* acinclude.m4 (LIBVIRT_COMPILE_WARNINGS): Define WARN_LDFLAGS as
an alias for WARN_CFLAGS.
* tools/Makefile.am (virsh_LDFLAGS): Use more canonical spelling.
* proxy/Makefile.am (libvirt_proxy_LDFLAGS): Likewise. Move
library...
(libvirt_proxy_LDADD): ...here.
* src/Makefile.am (virt_aa_helper_LDFLAGS): Use more canonical
spelling of WARN_LDFLAGS.
(libvirt_parthelper_LDFLAGS, libvirt_lxc_LDFLAGS): Likewise. Use
correct spelling of COVERAGE_LDFLAGS.
Reported by Matthias Bolte.
Jim Meyering [Mon, 17 May 2010 14:17:08 +0000 (16:17 +0200)]
build: avoid compile failure on linux kernels older than 2.6.19
* configure.ac: Check for <linux/magic.h>.
* src/util/storage_file.c: Include <linux/magic.h> only if present.
Linux kernels prior to 2.6.19 lacked it.
[__linux__] (NFS_SUPER_MAGIC): Define if not already defined.
Cole Robinson [Mon, 17 May 2010 14:15:53 +0000 (10:15 -0400)]
qemu: Report cmdline output if VM dies early
qemuReadLogOutput early VM death detection is racy and won't always work.
Startup then errors when connecting to the VM monitor. This won't report
the emulator cmdline output which is typically the most useful diagnostic.
Check if the VM has died at the very end of the monitor connection step,
and if so, report the cmdline output.
See also: https://bugzilla.redhat.com/show_bug.cgi?id=581381
Jim Meyering [Fri, 14 May 2010 10:38:43 +0000 (12:38 +0200)]
qemudDomainSetVcpus: avoid NULL-deref
* src/qemu/qemu_driver.c (qemudDomainSetVcpus): Avoid NULL-deref
upon unknown UUID. Call qemuDomainObjBeginJob(vm) only after
ensuring that vm != NULL, not before. This potential NULL-deref
was introduced by commit 2c555d87b0041e0d1ec4742386d2161d1b2f0600.
The patch worked for incremental builds, but broke fresh
builds, because it interfered with automake's automatic
dependency generation. Until I figure out how to make
automake do what we want, I'd rather leave cygwin broken
but fresh Linux builds working.
Ryota Ozaki [Fri, 14 May 2010 10:08:59 +0000 (19:08 +0900)]
Fix a misuse of virAsprintf in qemudDomainMemoryPeek
The code specifies driver->cacheDir as the format string,
but it usually doesn't contain '%s', so the subsequent
argument, "/qemu.mem.XXXXXX", is always ignored.
Setting dynamic_ownership=0 in /etc/libvirt/qemu.conf prevents
libvirt's DAC security driver from setting uid/gid on disk
files when starting/stopping QEMU, allowing the admin to manage
this manually. As a side effect it also stopped setting of
uid/gid when saving guests to a file, which completely breaks
save when QEMU is running non-root. Thus saved state labelling
code must ignore the dynamic_ownership parameter
* src/qemu/qemu_security_dac.c: Ignore dynamic_ownership=0 when
doing save/restore image labelling
Don't reset user/group/security label on shared filesystems during migrate
When QEMU runs with its disk on NFS, and as a non-root user, the
disk is chownd to that non-root user. When migration completes
the last step is shutting down the QEMU on the source host. THis
normally resets user/group/security label. This is bad when the
VM was just migrated because the file is still in use on the dest
host. It is thus neccessary to skip the reset step for any files
found to be on a shared filesystem
* src/libvirt_private.syms: Export virStorageFileIsSharedFS
* src/util/storage_file.c, src/util/storage_file.h: Add a new
method virStorageFileIsSharedFS() to determine if a file is
on a shared filesystem (NFS, GFS, OCFS2, etc)
* src/qemu/qemu_driver.c: Tell security driver not to reset
disk labels on migration completion
* src/qemu/qemu_security_dac.c, src/qemu/qemu_security_stacked.c,
src/security/security_selinux.c, src/security/security_driver.h,
src/security/security_apparmor.c: Add ability to skip disk
restore step for files on shared filesystems.
The cgroups ACL code was only allowing the primary disk image.
It is possible to chain images together, so we need to search
for backing stores and add them to the ACL too. Since the ACL
only handles block devices, we ignore the EINVAL we get from
plain files. In addition it was missing code to teardown the
cgroup when hot-unplugging a disk
* src/qemu/qemu_driver.c: Allow backing stores in cgroup ACLs
and add missing teardown code in unplug path
Add support for NIC hotplug using netdev_add in QEMU
QEMU is gaining a new monitor command netdev_add for hotplugging
NICs using the netdev backend code. We already support this on
the command this, though it is disabled. This adds support for
hotplug too, also to remain disabled until 0.13 QEMU is released
* src/qemu/qemu_driver.c: Support netdev hotplug for NICs
* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h,
src/qemu/qemu_monitor_json.c, src/qemu/qemu_monitor_json.h,
src/qemu/qemu_monitor_text.c, src/qemu/qemu_monitor_text.h: Add
support for netdev_add and netdev_remove commands
Jiri Denemark [Wed, 12 May 2010 09:50:52 +0000 (11:50 +0200)]
Fix monitor ref counting when adding event handle
When closing a monitor using qemuMonitorClose(), we are aware of
the possibility the monitor is still being used somewhere:
/* NB: ordinarily one might immediately set mon->watch to -1
* and mon->fd to -1, but there may be a callback active
* that is still relying on these fields being valid. So
* we merely close them, but not clear their values and
* use this explicit 'closed' flag to track this state */
but since we call virEventAddHandle() on that monitor without increasing
its ref counter, the monitor is still freed which makes possible users
of it quite unhappy. The unhappiness can lead to a hang if qemuMonitorIO
tries to lock mutex which no longer exists.
Jiri Denemark [Mon, 10 May 2010 13:13:17 +0000 (15:13 +0200)]
Remove watches before calling REMOTE_PROC_CLOSE
First calling REMOTE_PROC_CLOSE and then removing watches might lead to
a hang as HANGUP event can be triggered before the watches are actually
removed but after virConnectPtr is already freed. As a result of that
remoteDomainEventFired() would try to lock uninitialized mutex, which
would hang for ever.
Jim Meyering [Tue, 11 May 2010 15:43:16 +0000 (17:43 +0200)]
tests: correct PATH in new test, for when running manually
* tests/virsh-schedinfo: This test sets PATH internally, just in
case you're running it manually. Normally, the PATH setting from
tests/Makefile.am's TESTS_ENVIRONMENT is sufficient. Prepend the
correct directory, and take advantage of the PATH setting in one
more case.
Jim Meyering [Tue, 11 May 2010 13:38:21 +0000 (15:38 +0200)]
virsh: schedinfo --set invalid=value would simply ignore the option
For example, virsh -c test:///default schedinfo 1 --set P=k would
mistakenly exit successfully, giving no indication that it had failed
to set the scheduling parameter "P".
* tools/virsh.c (cmdSchedinfo): Diagnose an invalid --set j=k option,
rather than silently ignoring it.
* tests/virsh-schedinfo: New test for the above.
* tests/Makefile.am (test_scripts): Add it.
Reported by Jintao Yang in http://bugzilla.redhat.com/586632
Eric Blake [Mon, 10 May 2010 20:17:10 +0000 (14:17 -0600)]
maint: avoid spurious output if program not present
Some shells warn about missing programs before redirection;
the idiomatic way to silence them is to run the program check
inside a subshell, with the redirections outside the subshell.
But a subshell is only needed in places where it is reasonable
to expect the use of such a noisy shell in the first place.
* src/Makefile.am (remote_protocol-structs): Use subshell, for
FreeBSD 8.0 /bin/sh.
* cfg.mk (sc_preprocessor_indentation): Avoid subshell, since the
only users running cfg.mk can be assumed to have decent tools.
Jim Meyering [Fri, 7 May 2010 14:01:26 +0000 (16:01 +0200)]
help avoid accidental remote_protocol.x changes
Now, if you update remote_protocol.x without also updating
remote_protocol-structs to match, then "make check" will fail.
* src/Makefile.am (remote_protocol-structs): Extract list of
structs and member names from remote_protocol.o.
(check-local): Depend on it.
* src/remote_protocol-structs: New file.
Eric Blake [Tue, 4 May 2010 17:12:01 +0000 (11:12 -0600)]
mingw32-libvirt.spec: bring up to date
Right now, mingw32-portablexdr is not available in Fedora, but is
present in fedora-mingw.git. With that package, plus
redhat-rpm-config and this patch, it is once again possible to build
mingw32-libvirt from a Fedora 12 host.
That commit was not necessary. The problem is fixed by commit 0e9b3a269be9ce821615aba4aece87c4451d43ac, but I didn't rebuild
it properly after pulling in the commit and didn't notice it.
Eric Blake [Fri, 7 May 2010 16:39:52 +0000 (10:39 -0600)]
build: use LIBADD, not LDFLAGS, for adding libraries
Per automake, LDFLAGS is used early in the line, and LIBADD
(libraries) or LDADD (programs) is used late. On platforms like
cygwin, without lazy linking, this order matters. Therefore, libtool
commands, -L, and similar should be in LDFLAGS, but -l should be in
L*ADD.
* src/Makefile.am (*_LDFLAGS): Move libraries...
(*_LIBADD): ...to their LIBADD counterpart.
Matthew Booth [Fri, 7 May 2010 14:38:05 +0000 (16:38 +0200)]
Remove unused nwfilter field from struct remote_error
Change 965466c1 added a new field to struct remote_error, which broke
the RPC protocol. Fortunately the new field is unused, so this change
simply removes it again.
* src/remote/remote_protocol.(c|h|x): Remove remote_nwfilter from struct
remote_error
Eric Blake [Thu, 29 Apr 2010 03:26:57 +0000 (21:26 -0600)]
build: drop more redundant configure checks
* configure.ac (AC_CHECK_FUNCS_ONCE, AC_SYS_LARGEFILE): Rely on
gnulib for strtok_r and large file support.
(AC_OBJEXT): Drop call now done by AC_PROG_CC.
(m4_foreach_w): Drop macro guaranteed by gnulib.
(AC_C_CONST): Drop call declared obsolete by autoconf.
Eric Blake [Thu, 29 Apr 2010 02:39:11 +0000 (20:39 -0600)]
build: rely on gnulib's pthread module
Gnulib can guarantee that pthread.h exists, but for now, it is a dummy
header with no support for most pthread_* functions. Modify our
use of pthread to use function checks, rather than header checks,
to determine how much pthread support is present.
* bootstrap.conf (gnulib_modules): Add pthread.
* configure.ac: Drop all pthread.h checks. Optimize function
checks. Add check for pthread functions.
* src/Makefile.am (libvirt_lxc_LDADD): Ensure proper link.
* src/remote/remote_driver.c (remoteIOEventLoop): Depend on
pthread_sigmask, now that gnulib guarantees pthread.h.
* src/util/util.c (virFork): Likewise.
* src/util/threads.c (threads-pthread.c): Depend on
pthread_mutexattr_init, as a witness of full pthread support.
* src/util/threads.h (threads-pthread.h): Likewise.
Eric Blake [Tue, 4 May 2010 22:07:18 +0000 (16:07 -0600)]
util: fix va_start usage bug
Detected by clang. POSIX requires that the second argument to
va_start be the name of the last variable; and in some implementations,
passing *path instead of path would dereference bogus memory instead
of pulling arguments off the stack.
* src/util/util.c (virBuildPathInternal): Use correct argument to
va_start.
Kenneth Nagin [Tue, 4 May 2010 21:36:42 +0000 (15:36 -0600)]
qemu: live migration with non-shared storage for kvm
Support for live migration between hosts that do not share storage was
added to qemu-kvm release 0.12.1.
It supports two flags:
-b migration without shared storage with full disk copy
-i migration without shared storage with incremental copy (same base image
shared between source and destination).
I tested the live migration without shared storage (both flags) for native
and p2p with and without tunnelling. I also verified that the fix doesn't
affect normal migration with shared storage.
Matthias Bolte [Mon, 3 May 2010 23:41:55 +0000 (01:41 +0200)]
configure.ac: Avoid uname, which breaks cross-compilation
When cross-compiling on Linux, configure will misdetect the target as
Linux because it uses uname instead of relying on the $host variable.
This results in including libvirt_linux.syms into libvirt.syms and
therefore trying to export undefined symbols.
Replace uname checks with $host checks to fix this.
Daniel Veillard [Tue, 4 May 2010 14:13:55 +0000 (16:13 +0200)]
Various fixes for the spec file
This includes various things:
- fix the Requires: libvirt-client to use %{name} to allow easy
renaming
- when building ESX support one need libcurl-devel
- remove Makefile[.in] from xml/nwfilter in the docs, as this breaks
parallel install ation of i686 and x86_64 packages
- don't include nwfilter config files if not building with the daemon
all relatively trivial which is why I packed them together
* libvirt.spec.in: fix various small bugs
Jim Meyering [Thu, 15 Apr 2010 17:31:04 +0000 (19:31 +0200)]
docs: hacking: explain why using curly braces well is important
* docs/hacking.html.in: Use the "curly braces" section from coreutils'
HACKING, adapting for libvirt's different formatting style.
* HACKING: Sync from the above, still mostly manually.
Matthias Bolte [Mon, 3 May 2010 23:05:44 +0000 (01:05 +0200)]
mingw: Fix two undefined symbols
Add an empty body for virCondWaitUntil and move virPipeReadUntilEOF
out of the '#ifndef WIN32' block, because it compiles fine with MinGW
in combination with gnulib.
Eric Blake [Thu, 29 Apr 2010 03:36:03 +0000 (21:36 -0600)]
build: avoid compiler warning
Necessary on cygwin, where uid_t and gid_t are 4-byte long rather
than int, causing gcc -Wformat warnings.
* src/util/util.c (virFileOperationNoFork, virDirCreateNoFork)
(virFileOperation, virDirCreate, virGetUserEnt): Cast uid_t and
gid_t before passing to printf.
* .gitignore: Ignore Windows executables.
Stefan Berger [Mon, 3 May 2010 22:14:58 +0000 (18:14 -0400)]
nwfilter: skip some interfaces on filter update
When a filter is updated, only those interfaces must have their old
rules cleared that either reference the filter directly or indirectly
through another filter. Remember between the different steps of the
instantiation of the filters which interfaces must be skipped. I am
using a hash map to remember the names of the interfaces and store a
bogus pointer to ~0 into it that need not be freed.
Stefan Berger [Mon, 3 May 2010 22:11:48 +0000 (18:11 -0400)]
pass info where request stems from to have rules applied
For the decision on whether to instantiate the rules, the check for a
pending IP address learn request is not sufficient since then only the
thread could instantiate the rules. So, a boolean needs to be passed
when the thread instantiates the filter rules late and the IP address
learn request is still pending in order to override the check for the
pending learn request. If the rules are to be updated while the thread
is active, this will not be done immediately but the thread will do that
later on.
Eric Blake [Mon, 3 May 2010 20:44:12 +0000 (14:44 -0600)]
build: prefer WIN32 over __MINGW32__ checks
WIN32 is always defined when __MINGW32__ is defined, but the
converse is not true. WIN32 is more generic, if someone were
to ever attempt porting to a microsoft compiler. This does
not affect Cygwin, which intentionally does not define WIN32.
* src/qemu/qemu_driver.c (qemuDomainGetBlockInfo): Use more
generic flag macro.
* src/storage/storage_backend.c
(virStorageBackendUpdateVolTargetInfoFD)
(virStorageBackendRunProgRegex): Likewise.
* tools/console.h (vshRunConsole): Likewise.
Matthias Bolte [Mon, 3 May 2010 10:21:58 +0000 (12:21 +0200)]
mingw: Fix symbol export
In commit 98fb83ce25f46e0236706fa6e0943032d921935f I changed the
version script handling. But it seems that I didn't test this properly
and broke it. The .def file is passed to the compiler directly, but it
should get passed to the linker instead.
Set VERSION_SCRIPT_FLAGS to -Wl, to pass the .def file correctly to
the linker.
This fixes the undefined symbol errors while linking virsh.
Laine Stump [Sat, 1 May 2010 04:16:52 +0000 (00:16 -0400)]
Fix memory leaks in cmdInterfaceEdit and cmdNWFilterEdit.
This applies a fix to thos functions similar to that made to cmdEdit
in 270895063d1cf86ab42fa220a8d090c24d58dbc0, thus fnixing a memory
leak - if tmp is unlinked and NULLed early in the function, the memory
used by tmp is never freed. Since we will always unlink tmp prior to
freeing its memory at the end of the function, just remove the earlier
code and let cleanup: do the cleanup.
Ryota Ozaki [Mon, 3 May 2010 09:13:26 +0000 (11:13 +0200)]
lxc: Fix failure on starting a domain with multiple interfaces
[Error message]
error: Failed to start domain lxc_test1
error: internal error Failed to create veth device pair: 512
The reason of the failure is that lxc driver unexpectedly re-uses
an auto-assigned veth name and tries to create the created veth
again. The failure will happen when a domain has multiple network
interfaces and the names of those are not specified in XML.
The patch fixes the problem by resetting buffers of veth names
in every iteration of creating veth.
* src/lxc/lxc_driver.c: prevent re-using auto-assigned veth name
Reported by Kumar L Srikanth-B22348.
<hostdev> address parsing previously attempted to detect the number
base: currently it is hardcoded to base 16, which can break PCI
assignment via virt-manager. Revert to the previous behavior.
* src/conf/domain_conf.c: virDomainDevicePCIAddressParseXML, switch to
virStrToLong_ui(bus, NULL, 0, ...) to autodetect base
Stefan Berger [Fri, 30 Apr 2010 12:10:12 +0000 (08:10 -0400)]
Syncronize the teardown of rules with the thread
Introduce a function to notify the IP address learning
thread to terminate and thus release the lock on the interface.
Notify the thread before grabbing the lock on the interface
and tearing down the rules. This prevents a 'virsh destroy' to
tear down the rules that the IP address learning thread has
applied.
Stefan Berger [Fri, 30 Apr 2010 12:06:18 +0000 (08:06 -0400)]
Clean all tables before applying 'basic' rules
The functions invoked by the IP address learning thread
that apply some basic filtering rules did not clean up
any previous filtering rules that may still be there
(due to a libvirt restart for example). With the
patch below all the rules are cleaned up first.
Also, I am introducing a function to drop all traffic
in case the IP address learning thread could not apply
the rules.
Stefan Berger [Fri, 30 Apr 2010 11:51:47 +0000 (07:51 -0400)]
nwfilter: Also pick IP address from a DHCP ACK message
The local DHCP server on virtbr0 sends DHCP ACK messages when a VM is
started and requests an IP address while the initial DHCP lease on the
VM's MAC address hasn't expired. So, also pick the IP address of the VM
if that type of message is seen.
Thanks to Gerhard Stenzel for providing a test case for this.
Changes from V1 to V2:
- cleanup: replacing DHCP option numbers through constants
Ubuntu's gntls package generates an Issuer line that looks like this:
Issuer: C=US,ST=NY,L=Rochester,O=example.com,CN=example.com CA,EMAIL=hostmaster@example.com
While Red Hat's looks like this
Issuer: CN=Red Hat Emerging Technologies
Note the leading whitespace, and the additional fields in the former.
This patch updates the regular expression to:
* trim leading characters before "Issuer:"
* trim anything between Issuer: and CN=
* trim anything after the next ,
I've tested this against the certool output of both RH and Ubuntu
generated certs.
Signed-off-by: Dustin Kirkland <kirkland@canonical.com> Signed-off-by: Eric Blake <eblake@redhat.com>
When using -device syntax, the IO event will have a different
prefix, 'drive-' that needs to be skipped over before matching
against the libvirt disk alias
* src/qemu/qemu_driver.c: Skip QEMU_DRIVE_HOST_PREFIX in IO event
Implement python binding for virDomainGetBlockInfo
This binds the virDomainGetBlockInfo API to python's blockInfo
method on the domain object
>>> c = libvirt.openReadOnly('qemu:///session')
>>> d = c.lookupByName('demo')
>>> f = d.blockInfo("/dev/loop0", 0)
>>> print f
[1048576000L, 104857600L, 104857600L]
* python/libvirt-override-api.xml: Define override signature
* python/generator.py: Skip C impl generator for virDomainGetBlockInfo
* python/libvirt-override.c: Manual impl of virDomainGetBlockInfo
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