virFileOpenAs previously would only try opening a file as the current
user, or as a different user, but wouldn't try both methods in a
single call. This made it cumbersome to use as a replacement for
open(2). Additionally, it had a lot of historical baggage that led to
it being difficult to understand.
This patch refactors virFileOpenAs in the following ways:
* reorganize the code so that everything dealing with both the parent
and child sides of the "fork+setuid+setgid+open" method are in a
separate function. This makes the public function easier to understand.
* Allow a single call to virFileOpenAs() to first attempt the open as
the current user, and if that fails to automatically re-try after
doing fork+setuid (if deemed appropriate, i.e. errno indicates it
would now be successful, and the file is on a networkFS). This makes
it possible (in many, but possibly not all, cases) to drop-in
virFileOpenAs() as a replacement for open(2).
(NB: currently qemuOpenFile() calls virFileOpenAs() twice, once
without forking, then again with forking. That unfortunately can't
be changed without at least some discussion of the ramifications,
because the requested file permissions are different in each case,
which is something that a single call to virFileOpenAs() can't deal
with.)
* Add a flag so that any fchown() of the file to a different uid:gid
is explicitly requested when the function is called, rather than it
being implied by the presence of the O_CREAT flag. This just makes
for less subtle surprises to consumers. (Commit
b1643dc15c added the check for O_CREAT
before forcing ownership. This patch just makes that restriction
more explicit.)
* If either the uid or gid is specified as "-1", virFileOpenAs will
interpret this to mean "the current [gu]id".
All current consumers of virFileOpenAs should retain their present
behavior (after a few minor changes to their setup code and
arguments).
Rename the src/util/netlink files to src/util/virnetlink to
better fit the naming scheme. Also rename nlComm to virNetlinkCommand.
Signed-off-by: D. Herrendoerfer <d.herrendoerfer@herrendoerfer.name>
Sometimes, its easier to run children with 2>&1 in shell notation,
and just deal with stdout and stderr interleaved. This was already
possible for fd handling; extend it to also work when doing string
capture of a child process.
* docs/internals/command.html.in: Document this.
* src/util/command.c (virCommandSetErrorBuffer): Likewise.
(virCommandRun, virExecWithHook): Implement it.
* tests/commandtest.c (test14): Test it.
* daemon/remote.c (remoteDispatchAuthPolkit): Use new command
feature.
This patch adds API to modify domain metadata for running and stopped
domains. The api supports changing description, title as well as the
newly added <metadata> element. The API has support for storing data in
the metadata element using xml namespaces.
* include/libvirt/libvirt.h.in
* src/libvirt_public.syms
- add function headers
- add enum to select metadata to operate on
- export functions
* src/libvirt.c
- add public api implementation
* src/driver.h
- add driver support
* src/remote/remote_driver.c
* src/remote/remote_protocol.x
- wire up the remote protocol
* include/libvirt/virterror.h
* src/util/virterror.c
- add a new error message note that metadata for domain are
missing
If we are building not on a WIN32 architecture and without HAVE_CAPNG
virSetCapabilities has unused argument and virClearCapabilities
is unused as well.
This patch introduces virSetCapabilities() function and implements
virCommandAllowCap() function.
Existing virClearCapabilities() is function to clear all capabilities.
Instead virSetCapabilities() is function to set arbitrary capabilities.
Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: Shota Hirae <m11g1401@hibikino.ne.jp>
And hook it up for policykit auth. This allows virt-manager to detect
that the user clicked the policykit 'cancel' button and not throw
an 'authentication failed' error message at the user.
The virEmitXMLWarning function should always have been in
the xml.[hc] files, and should use virXML as its name
prefix
* src/util/util.c, src/util/util.h: Remove virEmitXMLWarning
* src/util/xml.c, src/util/xml.h: Add virXMLEmitWarning
On RHEL5, I got:
util/virrandom.c:66: warning: nested extern declaration of '_gl_verify_function66' [-Wnested-externs]
The fix is to hoist the verify earlier. Also some other hodge-podge
fixes I noticed while reviewing Dan's recent series.
* .gitignore: Ignore new test.
* src/util/cgroup.c: Bump copyright year.
* src/util/virhash.c: Fix typo in description.
* src/util/virrandom.c (virRandomBits): Mark doc comment, and
hoist assert to silence older gcc.
Recent discussions have illustrated the potential for DOS attacks
with the hash table implementations used by most languages and
libraries.
https://lwn.net/Articles/474912/
libvirt has an internal hash table impl, and uses hash tables for
a variety of purposes. The hash key generation code is pretty
simple and thus not strongly collision resistant.
This patch replaces the current libvirt hash key generator with
the (public domain) Murmurhash3 code. In addition every hash
table now gets a random seed value which is used to perturb the
hashing code. This should make it impossible to mount any
practical attack against libvirt hashing code.
* bootstrap.conf: Import bitrotate module
* src/Makefile.am: Add virhashcode.[ch]
* src/util/util.c: Make virRandom() return a fixed 32 bit
integer value.
* src/util/hash.c, src/util/hash.h, src/util/cgroup.c: Replace
hash code generation with a call to virHashCodeGen()
* src/util/virhashcode.h, src/util/virhashcode.c: Add a new
virHashCodeGen() API using the Murmurhash3 algorithm.
In preparation for the patch to include Murmurhash3, which
introduces a virhashcode.h and virhashcode.c files, rename
the existing hash.h and hash.c to virhash.h and virhash.c
respectively.
In preparation for conversion over to use the Murmurhash3
algorithm, convert various virHash APIs to use size_t or
uint32 for their return values/parameters, instead of the
variable size 'unsigned long' or 'int' types
The old virRandom() API was not generating good random numbers.
Replace it with a new API virRandomBits which instead of being
told the upper limit, gets told the number of bits of randomness
required.
* src/util/virrandom.c, src/util/virrandom.h: Add virRandomBits,
and move virRandomInitialize
* src/util/util.h, src/util/util.c: Delete virRandom and
virRandomInitialize
* src/libvirt.c, src/security/security_selinux.c,
src/test/test_driver.c, src/util/iohelper.c: Update for
changes from virRandom to virRandomBits
* src/storage/storage_backend_iscsi.c: Remove bogus call
to virRandomInitialize & convert to virRandomBits
In file included from ../gnulib/lib/unistd.h:51:0,
from ../src/util/util.h:30,
from rpc/virkeepalive.c:29:
/usr/x86_64-w64-mingw32/sys-root/mingw/include/winsock2.h:15:2: warning: #warning Please include winsock2.h before windows.h [-Wcpp]
Reported by Marc-André Lureau.
* src/util/threads-win32.h (includes): Pick up winsock2.h before
windows.h, as required by mingw64.
Add a virFileTouch API which ensures that a file will always
exist, even if zero length
* src/util/virfile.c, src/util/virfile.h,
src/libvirt_private.syms: Introduce virFileTouch
POLLIN and POLLHUP are not mutually exclusive. Currently the following
seems possible: the child writes 3K to its stdout or stderr pipe, and
immediately closes it. We get POLLIN|POLLHUP (I'm not sure that's possible
on Linux, but SUSv4 seems to allow it). We read 1K and throw away the
rest.
When poll() returns and we're about to check the /revents/ member in a
given array element, let's map all the revents bits to two (independent)
ideas: "let's attempt to read()", and "let's attempt to write()". This
should cover all errors, EOFs, and normal conditions; the read()/write()
call should report any pending error.
Under this approach, both POLLHUP and POLLERR are mapped to "needs read()"
if we're otherwise prepared for POLLIN. POLLERR also maps to "needs
write()" if we're otherwise prepared for POLLOUT. The rest of the mappings
(POLLPRI etc.) would be easy, but probably useless for pipes.
Additionally, SUSv4 doesn't appear to forbid POLLIN|POLLERR (or
POLLOUT|POLLERR) set simultaneously. One could argue that the read() or
write() call would return without blocking in these cases (with an error),
so POLLIN / POLLOUT would be justified beside POLLERR.
The code now penalizes POLLIN|POLLERR differently from plain POLLERR. The
former (ie. read() returning -1) is terminal and we jump to cleanup, while
plain POLLERR masks only the affected file descriptor for the future.
Let's unify those.
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
When converting a linear enum to a string, we have checks in
place in the VIR_ENUM_IMPL macro to ensure that there is one
string for every value, which lets us quickly flag if a user
added a value but forgot to add a counterpart string. However,
this only works if we use the _LAST marker.
* cfg.mk (sc_require_enum_last_marker): New syntax check.
* src/conf/domain_conf.h (virDomainSnapshotState): Add new marker.
* src/conf/domain_conf.c (virDomainSnapshotState): Fix offender.
* src/qemu/qemu_monitor_json.c (qemuMonitorWatchdogAction)
(qemuMonitorIOErrorAction, qemuMonitorGraphicsAddressFamily):
Likewise.
* src/util/virtypedparam.c (virTypedParameter): Likewise.
While we still don't want to enable gcc's new -Wformat-literal
warning, I found a rather easy case where the warning could be
reduced, by getting rid of obsolete error-reporting practices.
This is the last place where we were passing the (unused) net
and conn arguments for constructing an error.
* src/util/virterror_internal.h (virErrorMsg): Delete prototype.
(virReportError): Delete macro.
* src/util/virterror.c (virErrorMsg): Make static.
* src/libvirt_private.syms (virterror_internal.h): Drop export.
* src/util/conf.c (virConfError): Convert to macro.
(virConfErrorHelper): New function, and adjust error calls.
* src/xen/xen_hypervisor.c (virXenErrorFunc): Delete.
(xenHypervisorGetSchedulerType)
(xenHypervisorGetSchedulerParameters)
(xenHypervisorSetSchedulerParameters)
(xenHypervisorDomainBlockStats)
(xenHypervisorDomainInterfaceStats)
(xenHypervisorDomainGetOSType)
(xenHypervisorNodeGetCellsFreeMemory, xenHypervisorGetVcpus):
Update callers.
Preparation for another patch that refactors common patterns
into the new file for fewer lines of code overall.
* src/util/util.h (virTypedParameterArrayClear): Move...
* src/util/virtypedparam.h: ...to new file.
(virTypedParameterArrayValidate, virTypedParameterAssign): New
prototypes.
* src/util/util.c (virTypedParameterArrayClear): Likewise.
* src/util/virtypedparam.c: New file.
* po/POTFILES.in: Mark file for translation.
* src/Makefile.am (UTIL_SOURCES): Build it.
* src/libvirt_private.syms (util.h): Split...
(virtypedparam.h): to new section.
(virkeycode.h): Sort.
* daemon/remote.c: Adjust callers.
* tools/virsh.c: Likewise.
We had a memory leak on a very arcane OOM situation (unlikely to ever
hit in practice, but who knows if libvirt.so would ever be linked
into some other program that exhausts all thread-local storage keys?).
I found it by code inspection, while analyzing a valgrind report
generated by Alex Jia.
* src/util/threads.h (virThreadLocalSet): Alter signature.
* src/util/threads-pthread.c (virThreadHelper): Reduce allocation
lifetime.
(virThreadLocalSet): Detect failure.
* src/util/threads-win32.c (virThreadLocalSet): Likewise.
(virCondWait): Fix caller.
* src/util/virterror.c (virLastErrorObject): Likewise.
Given an LXC guest with a root filesystem path of
/export/lxc/roots/helloworld/root
During startup, we will pivot the root filesystem to end up
at
/.oldroot/export/lxc/roots/helloworld/root
We then try to open
/.oldroot/export/lxc/roots/helloworld/root/dev/pts
Now consider if '/export/lxc' is an absolute symlink pointing
to '/media/lxc'. The kernel will try to open
/media/lxc/roots/helloworld/root/dev/pts
whereas it should be trying to open
/.oldroot//media/lxc/roots/helloworld/root/dev/pts
To deal with the fact that the root filesystem can be moved,
we need to resolve symlinks in *any* part of the filesystem
source path.
* src/libvirt_private.syms, src/util/util.c,
src/util/util.h: Add virFileResolveAllLinks to resolve
all symlinks in a path
* src/lxc/lxc_container.c: Resolve all symlinks in filesystem
paths during startup
pciTrySecondaryBusReset checks if there is active device on the
same bus, however, qemu driver doesn't maintain an effective
list for the inactive devices, and it passes meaningless argument
for parameter "inactiveDevs". e.g. (qemuPrepareHostdevPCIDevices)
if (!(pcidevs = qemuGetPciHostDeviceList(hostdevs, nhostdevs)))
return -1;
..skipped...
if (pciResetDevice(dev, driver->activePciHostdevs, pcidevs) < 0)
goto reattachdevs;
NB, the "pcidevs" used above are extracted from domain def, and
thus one won't be able to attach a device of which bus has other
device even detached from host (nodedev-detach). To see more
details of the problem:
RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=773667
This patch is to resolve the problem by introducing an inactive
PCI device list (just like qemu_driver->activePciHostdevs), and
the whole logic is:
* Add the device to inactive list during nodedev-dettach
* Remove the device from inactive list during nodedev-reattach
* Remove the device from inactive list during attach-device
(for non-managed device)
* Add the device to inactive list after detach-device, only
if the device is not managed
With the above, we have a sufficient inactive PCI device list, and thus
we can use it for pciResetDevice. e.g.(qemuPrepareHostdevPCIDevices)
if (pciResetDevice(dev, driver->activePciHostdevs,
driver->inactivePciHostdevs) < 0)
goto reattachdevs;
Detected by Coverity. Although unlikely, if we are ever started
with stdin closed, we could reach a situation where we open a
uuid file but then fail to close it, making that file the new
stdin for the rest of the process.
* src/util/uuid.c (getDMISystemUUID): Allow for stdin.
This functions enables us to get the Virtual Functions attached to
a Physical function given the name of a SR-IOV physical functio.
In order to accomplish the task, added a getter function pciGetDeviceAddrString
to get the BDF of the Virtual Function in a char array.
Commit db371a2 mistakenly added new functions inside a #ifndef WIN32
guard, even though they are needed on all platforms.
* src/util/command.c (virCommandFDSet): Move outside WIN32
conditional.
Currently, virCommand implementation uses FD_ macros from
sys/select.h. However, those cannot handle more opened files
than FD_SETSIZE. Therefore switch to generalized implementation
based on array of integers.
It is a good practise to set revents to zero before doing any poll().
Moreover, we should check if event we waited for really occurred or
if any of fds we were polling on didn't encountered hangup.
A generic error code was returned, if the user aborted a migration job.
This made it hard to distinguish between a user requested abort and an
error that might have occured. This patch introduces a new error code,
which is returned in the specific case of a user abort, while leaving
all other failures with their existing code. This makes it easier to
distinguish between failure while mirgrating and an user requested
abort.
* include/libvirt/virterror.h: - add new error code
* src/util/virterror.c: - add message for the new error code
* src/qemu/qemu_migration.h: - Emit operation aborted error instead of
operation failed, on migration abort
Pool creates new workers dynamically. However, it is possible
for a pool to have no workers. If we want to free that pool,
we don't want to wait on quit condition as it will never be
signaled.
On RHEL 5, with libxml2-2.6.26, the build failed with:
virsh.c: In function 'vshNodeIsSuperset':
virsh.c:11951: warning: implicit declaration of function 'xmlChildElementCount'
(or if warnings aren't errors, a link failure later on).
* src/util/xml.h (virXMLChildElementCount): New prototype.
* src/util/xml.c (virXMLChildElementCount): New function.
* src/libvirt_private.syms (xml.h): Export it.
* tools/virsh.c (vshNodeIsSuperset): Use it.
https://bugzilla.redhat.com/show_bug.cgi?id=648855 mentioned a
misuse of 'an' where 'a' is proper; that has since been fixed,
but a search found other problems (some were a spelling error for
'and', while most were fixed by 'a').
* daemon/stream.c: Fix grammar.
* src/conf/domain_conf.c: Likewise.
* src/conf/domain_event.c: Likewise.
* src/esx/esx_driver.c: Likewise.
* src/esx/esx_vi.c: Likewise.
* src/rpc/virnetclient.c: Likewise.
* src/rpc/virnetserverprogram.c: Likewise.
* src/storage/storage_backend_fs.c: Likewise.
* src/util/conf.c: Likewise.
* src/util/dnsmasq.c: Likewise.
* src/util/iptables.c: Likewise.
* src/xen/xen_hypervisor.c: Likewise.
* src/xen/xend_internal.c: Likewise.
* src/xen/xs_internal.c: Likewise.
* tools/virsh.c: Likewise.
virBufferContentAndReset (intentionally) returns NULL for a buffer
with no content, but it is feasible to invoke a command with an
explicit empty string.
* src/util/command.c (virCommandAddEnvBuffer): Reject empty string.
(virCommandAddArgBuffer): Allow explicit empty argument.
* tests/commandtest.c (test9): Test it.
* tests/commanddata/test9.log: Adjust.
The RPC fixups needed on Linux are also needed on cygwin, and
worked without further tweaking to the list of fixups. Also,
unlike BSD, Cygwin exports 'struct ifreq', but unlike Linux,
Cygwin lacks the ioctls that we were using 'struct ifreq' to
access. This patch allows compilation under cygwin.
* src/rpc/genprotocol.pl: Also perform fixups on cygwin.
* src/util/virnetdev.c (HAVE_STRUCT_IFREQ): Also require AF_PACKET
definition.
* src/util/virnetdevbridge.c (virNetDevSetupControlFull): Only
compile if SIOCBRADDBR works.
This ought to fix the build if you have net/if.h but do
not have struct ifreq
* configure.ac: Check for struct ifreq in net/if.h
* src/util/virnetdev.c: Conditionalize to avoid use of
struct ifreq if it does not exist
The glibc time.h header has an undocumented __isleap macro
that we are using. Since it is undocumented & does not appear
on any other OS, stop using it and just define the macro in
libvirt code instead.
* src/util/virtime.c: Remove __isleap usage
Detected by Coverity. Leak introduced in commit c1df2c1.
Two bugs here:
1. memory leak on successful parse
2. failure to parse still returned success
Signed-off-by: Alex Jia <ajia@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
The virTimestamp and virTimeMs functions in src/util/util.h
duplicate functionality from virtime.h, in a non-async signal
safe manner. Remove them, and convert all code over to the new
APIs.
* src/util/util.c, src/util/util.h: Delete virTimeMs and virTimestamp
* src/lxc/lxc_driver.c, src/qemu/qemu_domain.c,
src/qemu/qemu_driver.c, src/qemu/qemu_migration.c,
src/qemu/qemu_process.c, src/util/event_poll.c: Convert to use
virtime APIs
The logging APIs need to be able to generate formatted timestamps
using only async signal safe functions. This rules out using
gmtime/localtime/malloc/gettimeday(!) and much more.
Introduce a new internal API which is async signal safe.
virTimeMillisNowRaw replacement for gettimeofday. Uses clock_gettime
where available, otherwise falls back to the unsafe
gettimeofday
virTimeFieldsNowRaw replacements for gmtime(), convert a timestamp
virTimeFieldsThenRaw into a broken out set of fields. No localtime()
replacement is provided, because converting to
local time is not practical with only async signal
safe APIs.
virTimeStringNowRaw replacements for strftime() which print a timestamp
virTimeStringThenRaw into a string, using a pre-determined format, with
a fixed size buffer (VIR_TIME_STRING_BUFLEN)
For each of these there is also a version without the Raw postfix
which raises a full libvirt error. These versions are not async
signal safe
* src/Makefile.am, src/util/virtime.c, src/util/virtime.h: New files
* src/libvirt_private.syms: New APis
* configure.ac: Check for clock_gettime in -lrt
* tests/virtimetest.c, tests/Makefile.am: Test new APIs
If suspend failed for some reason (e.g. too short duration) then
subsequent attempts to trigger suspend were rejected because we
had already marked a suspend as being in progress
* src/util/virnodesuspend.c: Don't mark suspend as active
until we've successfully triggered it
The command name for the suspend action does not need to be
strdup'd. The constant string can be used directly. This
also means the code can be trivially rearranged to make the
switch clearer
* src/util/virnodesuspend.c: Remove strdup of cmdString
To avoid probing the host power management features on any
call to virInitialize, only initialize the mutex in
virNodeSuspendInit. Do lazy load of the supported PM target
mask when it is actually needed
* src/util/virnodesuspend.c: Lazy init of supported features
If we ensure that virNodeSuspendGetTargetMask always resets
*bitmask to zero upon failure, there is no need for the
powerMgmt_valid field.
* src/util/virnodesuspend.c: Ensure *bitmask is zero upon
failure
* src/conf/capabilities.c, src/conf/capabilities.h: Remove
powerMgmt_valid field
* src/qemu/qemu_capabilities.c: Remove powerMgmt_valid
The node suspend capabilities APIs should not have been put into
util.[ch]. Instead move them into virnodesuspend.[ch]
* src/util/util.c, src/util/util.h: Remove suspend capabilities APIs
* src/util/virnodesuspend.c, src/util/virnodesuspend.h: Add
suspend capabilities APIs
* src/qemu/qemu_capabilities.c: Include virnodesuspend.h
Rename virGetPMCapabilities to virNodeSuspendGetTargetMask and
virDiscoverHostPMFeature to virNodeSuspendSupportsTarget.
* src/util/util.c, src/util/util.h: Rename APIs
* src/qemu/qemu_capabilities.c, src/util/virnodesuspend.c: Adjust
for new names
Since virDiscoverHostPMFeature is just checking one feature,
there is no reason for it to return a bitmask. Change it to
return a boolean
* src/util/util.c, src/util/util.h: Make virDiscoverHostPMFeature
return a boolean
The virHostPMCapability enum helper was declared in util.h
but implemented in capabilities.c, which is in a completely
separate library at link time. Move the declaration into the
capabilities.c file and rename it to match normal conventions
* src/util/util.h: Remove virHostPMCapability enum decl
* src/conf/capabilities.c: Add virCapsHostPMTarget enum
The internal virHostPMCapability enum just duplicates the
public virNodeSuspendTarget enum, but with different names.
* src/util/util.c: Use VIR_NODE_SUSPEND_TARGET constants
* src/util/util.h: Remove virHostPMCapability enum
* src/conf/capabilities.c: Use VIR_NODE_SUSPEND_TARGET_LAST
The VIR_NODE_SUSPEND_TARGET constants are not flags, so they
should just be assigned straightforward incrementing values.
* include/libvirt/libvirt.h.in: Change VIR_NODE_SUSPEND_TARGET
values
* src/util/virnodesuspend.c: Fix suspend target checks
Detected by Coverity. the only case is caller passes a NULL to 'format' variable,
then taking 'if (format)' false branch, the function qcow2GetBackingStoreFormat
will directly dereferences the NULL 'format' pointer variable.
Signed-off-by: Alex Jia <ajia@redhat.com>
Add the core functions that implement the functionality of the API.
Suspend is done by using an asynchronous mechanism so that we can return
the status to the caller before the host gets suspended. This asynchronous
operation is achieved by suspending the host in a separate thread of
execution. However, returning the status to the caller is only best-effort,
but not guaranteed.
To resume the host, an RTC alarm is set up (based on how long we want to
suspend) before suspending the host. When this alarm fires, the host
gets woken up.
Suspend-to-RAM operation on a host running Linux can take upto more than 20
seconds, depending on the load of the system. (Freezing of tasks, an operation
preceding any suspend operation, is given up after a 20 second timeout).
And Suspend-to-Disk can take even more time, considering the time required
for compaction, creating the memory image and writing it to disk etc.
So, we do not allow the user to specify a suspend duration of less than 60
seconds, to be on the safer side, since we don't want to prematurely declare
failure when we only had to wait for some more time.
Some systems support a feature known as 'Hybrid-Suspend', apart from the
usual system-wide sleep states such as Suspend-to-RAM (S3) or Suspend-to-Disk
(S4). Add the functionality to discover this power management feature and
export it in the capabilities XML under the <power_management> tag.
When aligning you need to clear the bits in the mask and leave the
others aside. Likely this code has never run, and will never run.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
virConnectSetKeepAlive public API can be used by a client connecting to
remote server to start using keepalive protocol. The API is handled
directly by remote driver and not transmitted over the wire to the
server.
The WITH_VIRTUALPORT macro is defined to 0 when disabled, not
left undefined. So #if must be used instead of #ifdef
* src/util/virnetdevvportprofile.c: s/#ifdef/#if/
This patch exports KVM Host Power Management capabilities as XML so that
higher-level systems management software can make use of these features
available in the host.
The script "pm-is-supported" (from pm-utils package) is run to discover if
Suspend-to-RAM (S3) or Suspend-to-Disk (S4) is supported by the host.
If either of them are supported, then a new tag "<power_management>" is
introduced in the XML under the <host> tag.
However in case the query to check for power management features succeeded,
but the host does not support any such feature, then the XML will contain
an empty <power_management/> tag. In the event that the PM query itself
failed, the XML will not contain any "power_management" tag.
To use this, new APIs could be implemented in libvirt to exploit power
management features such as S3/S4.
Xen4.1 initializes some unspecified sexpr config items to an empty
string, unlike previous Xen versions that would leave the item unset.
E.g. the kernel item for an HVM guest (non-direct kernel boot):
Xen4.0 and earlier
...
(image
(hvm
(kernel )
...
Xen4.1
...
(image
(hvm
(kernel '')
...
The empty string for kernel causes some grief in subsequent parsing
where existence of specified kernel is checked, e.g.
if (!def->os.kernel)
...
This patch solves the problem in sexpr_node_copy() by not copying
a node containing an empty string.
Add a function to the virHashTable for getting an array of the hash table's
key-value pairs and have the keys (optionally) sorted.
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Update virNetDevMacVLanCreateWithVPortProfile to allow creation
of plain macvlan devices, as well as macvtap devices. The former
is useful for LXC containers
* src/qemu/qemu_command.c: Explicitly request a macvtap device
* src/util/virnetdevmacvlan.c, src/util/virnetdevmacvlan.h: Add
new flag to allow switching between macvlan and macvtap
creation
Move the ifaceMacvtapLinkDump and ifaceGetNthParent functions
into virnetdevvportprofile.c since they are specific to that
code. This avoids polluting the headers with the Linux specific
netlink data types
* src/util/interface.c, src/util/interface.h: Move
ifaceMacvtapLinkDump and ifaceGetNthParent functions and delete
remaining file
* src/util/virnetdevvportprofile.c: Add ifaceMacvtapLinkDump
and ifaceGetNthParent functions
* src/network/bridge_driver.c, src/nwfilter/nwfilter_gentech_driver.c,
src/nwfilter/nwfilter_learnipaddr.c, src/util/virnetdevmacvlan.c:
Remove include of interface.h
Rename ifaceIsVirtualFunction to virNetDevIsVirtualFunction,
ifaceGetVirtualFunctionIndex to virNetDevGetVirtualFunctionIndex
and ifaceGetPhysicalFunction to virNetDevGetPhysicalFunction
* src/util/interface.c, src/util/interface.h: Rename APIs
* src/util/virnetdevvportprofile.c: Update for API rename
Rename the ifaceCheck method to virNetDevValidateConfig and change
so that it always raises an error and returns -1 on error.
* src/util/interface.c, src/util/interface.h: Rename ifaceCheck
to virNetDevValidateConfig
* src/nwfilter/nwfilter_gentech_driver.c,
src/nwfilter/nwfilter_learnipaddr.c: Update for API rename
To match up with the existing virNetDevSetIPv4Address, rename
ifaceGetIPAddress to virNetDevGetIPv4Address
* util/interface.h, util/interface.c: Rename API
* network/bridge_driver.c: Update for API rename
Rename the ifaceGetIndex method to virNetDevGetIndex and
ifaceGetVlanID to virNetDevGetVLanID. Also change the error
reporting behaviour to always raise errors and return -1 on
failure
* util/interface.c, util/interface.h: Rename ifaceGetIndex
and ifaceGetVLAN
* nwfilter/nwfilter_gentech_driver.c, nwfilter/nwfilter_learnipaddr.c,
nwfilter/nwfilter_learnipaddr.c, util/virnetdevvportprofile.c: Update
for API renames and error handling changes
Move virNetDevReplaceMacAddress and virNetDevRestoreMacAddress
to the virnetdev.c file where they naturally belong
* util/interface.c, util/interface.h: Remove
virNetDevReplaceMacAddress and virNetDevRestoreMacAddress
* util/virnetdev.c, util/virnetdev.h: Add
virNetDevReplaceMacAddress and virNetDevRestoreMacAddress
Rename ifaceReplaceMacAddress to virNetDevReplaceMacAddress
and ifaceRestoreMacAddress to virNetDevRestoreMacAddress.
* util/interface.c, util/interface.h, util/virnetdevmacvlan.c:
Rename APIs
Move the low level macvlan creation APIs into the
virnetdevmacvlan.c file where they more naturally
belong
* util/interface.c, util/interface.h: Remove virNetDevMacVLanCreate
and virNetDevMacVLanDelete
* util/virnetdevmacvlan.c, util/virnetdevmacvlan.h: Add
virNetDevMacVLanCreate and virNetDevMacVLanDelete
Rename ifaceMacvtapLinkAdd to virNetDevMacVLanCreate and
ifaceLinkDel to virNetDevMacVLanDelete. Strictly speaking
the latter isn't restricted to macvlan devices, but that's
the only use libvirt has for it.
* util/interface.c, util/interface.h,
util/virnetdevmacvlan.c: Rename APIs
Rename virNetDevMacVLanCreate to virNetDevMacVLanCreateWithVPortProfile
and virNetDevMacVLanDelete to virNetDevMacVLanDeleteWithVPortProfile
To make way for renaming the other macvlan creation APIs in
interface.c
* util/virnetdevmacvlan.c, util/virnetdevmacvlan.h,
qemu/qemu_command.c, qemu/qemu_hotplug.c, qemu/qemu_process.c:
Rename APIs
Rename the macvtap.c file to virnetdevmacvlan.c to reflect its
functionality. Move the port profile association code out into
virnetdevvportprofile.c. Make the APIs available unconditionally
to callers
* src/util/macvtap.h: rename to src/util/virnetdevmacvlan.h,
* src/util/macvtap.c: rename to src/util/virnetdevmacvlan.c
* src/util/virnetdevvportprofile.c, src/util/virnetdevvportprofile.h:
Pull in vport association code
* src/Makefile.am, src/conf/domain_conf.h, src/qemu/qemu_conf.c,
src/qemu/qemu_conf.h, src/qemu/qemu_driver.c: Update include
paths & remove conditional compilation
In preparation for code re-organization, rename the Macvtap
management APIs to have the following patterns
virNetDevMacVLanXXXXX - macvlan/macvtap interface management
virNetDevVPortProfileXXXX - virtual port profile management
* src/util/macvtap.c, src/util/macvtap.h: Rename APIs
* src/conf/domain_conf.c, src/network/bridge_driver.c,
src/qemu/qemu_command.c, src/qemu/qemu_command.h,
src/qemu/qemu_driver.c, src/qemu/qemu_hotplug.c,
src/qemu/qemu_migration.c, src/qemu/qemu_process.c,
src/qemu/qemu_process.h: Update for renamed APIs
Replacing the strchr call with two variables through a strstr call.
Calling strchr with two variables triggers a gcc 4.3/4.4
bug when used in combination with -Wlogical-op and at least -O1.
The ifaceSetMac and ifaceGetMac APIs duplicate the functionality
of the virNetDevSetMAC and virNetDevGetMAC APIs, but returning
errno's instead of raising errors.
* src/util/interface.c, src/util/interface.h: Remove
ifaceSetMac and ifaceGetMac APIs, adjusting callers
for new error behaviour
The ifaceUp, ifaceDown, ifaceCtrl & ifaceIsUp APIs can be replaced
with calls to virNetDevSetOnline and virNetDevIsOnline
* src/util/interface.c, src/util/interface.h: Delete ifaceUp,
ifaceDown, ifaceCtrl & ifaceIsUp
* src/nwfilter/nwfilter_gentech_driver.c, src/util/macvtap.c:
Update to use virNetDevSetOnline and virNetDevIsOnline
Move the virNetDevSetName and virNetDevSetNamespace APIs out
of LXC's veth.c and into virnetdev.c.
Move the remaining content of the file to src/util/virnetdevveth.c
* src/lxc/veth.c: Rename to src/util/virnetdevveth.c
* src/lxc/veth.h: Rename to src/util/virnetdevveth.h
* src/util/virnetdev.c, src/util/virnetdev.h: Add
virNetDevSetName and virNetDevSetNamespace
* src/lxc/lxc_container.c, src/lxc/lxc_controller.c,
src/lxc/lxc_driver.c: Update include paths
The src/util/network.c file is a dumping ground for many different
APIs. Split it up into 5 pieces, along functional lines
- src/util/virnetdevbandwidth.c: virNetDevBandwidth type & helper APIs
- src/util/virnetdevvportprofile.c: virNetDevVPortProfile type & helper APIs
- src/util/virsocketaddr.c: virSocketAddr and APIs
- src/conf/netdev_bandwidth_conf.c: XML parsing / formatting
for virNetDevBandwidth
- src/conf/netdev_vport_profile_conf.c: XML parsing / formatting
for virNetDevVPortProfile
* src/util/network.c, src/util/network.h: Split into 5 pieces
* src/conf/netdev_bandwidth_conf.c, src/conf/netdev_bandwidth_conf.h,
src/conf/netdev_vport_profile_conf.c, src/conf/netdev_vport_profile_conf.h,
src/util/virnetdevbandwidth.c, src/util/virnetdevbandwidth.h,
src/util/virnetdevvportprofile.c, src/util/virnetdevvportprofile.h,
src/util/virsocketaddr.c, src/util/virsocketaddr.h: New pieces
* daemon/libvirtd.h, daemon/remote.c, src/conf/domain_conf.c,
src/conf/domain_conf.h, src/conf/network_conf.c,
src/conf/network_conf.h, src/conf/nwfilter_conf.h,
src/esx/esx_util.h, src/network/bridge_driver.c,
src/qemu/qemu_conf.c, src/rpc/virnetsocket.c,
src/rpc/virnetsocket.h, src/util/dnsmasq.h, src/util/interface.h,
src/util/iptables.h, src/util/macvtap.c, src/util/macvtap.h,
src/util/virnetdev.h, src/util/virnetdevtap.c,
tools/virsh.c: Update include files
The virtual port profile parsing/formatting APIs do not
correctly handle unknown profile type strings/numbers.
They behave as a no-op, instead of raising an error
* src/util/network.c, src/util/network.h: Fix error
handling of port profile APIs
* src/conf/domain_conf.c, src/conf/network_conf.c: Update
for API changes
Rename the virVirtualPortProfileParams struct to be
virNetDevVPortProfile, and rename the APIs to match
this prefix.
* src/util/network.c, src/util/network.h: Rename port profile
APIs
* src/conf/domain_conf.c, src/conf/domain_conf.h,
src/conf/network_conf.c, src/conf/network_conf.h,
src/network/bridge_driver.c, src/qemu/qemu_hotplug.c,
src/util/macvtap.c, src/util/macvtap.h: Update for
renamed APIs/structs
This allows strings to be transported between client and server
in the context of name-type-value virTypedParameter functions.
For compatibility,
o new clients will not send strings to old servers, based on
a feature check
o new servers will not send strings to old clients without the
flag VIR_TYPED_PARAM_STRING_OKAY; this will be enforced at
the RPC layer in the next patch, so that drivers need not
worry about it in general. The one exception is that
virDomainGetSchedulerParameters lacks a flags argument, so
it must not return a string; drivers that forward that
function on to virDomainGetSchedulerParametersFlags will
have to pay attention to the flag.
o the flag VIR_TYPED_PARAM_STRING_OKAY is set automatically,
based on a feature check (so far, no driver implements it),
so clients do not have to worry about it
Future patches can then enable the feature on a per-driver basis.
This patch also ensures that drivers can blindly strdup() field
names (previously, a malicious client could stuff 80 non-NUL bytes
into field and cause a read overrun).
* src/libvirt_internal.h (VIR_DRV_FEATURE_TYPED_PARAM_STRING): New
driver feature.
* src/libvirt.c (virTypedParameterValidateSet)
(virTypedParameterSanitizeGet): New helper functions.
(virDomainSetMemoryParameters, virDomainSetBlkioParameters)
(virDomainSetSchedulerParameters)
(virDomainSetSchedulerParametersFlags)
(virDomainGetMemoryParameters, virDomainGetBlkioParameters)
(virDomainGetSchedulerParameters)
(virDomainGetSchedulerParametersFlags, virDomainBlockStatsFlags):
Use them.
* src/util/util.h (virTypedParameterArrayClear): New helper
function.
* src/util/util.c (virTypedParameterArrayClear): Implement it.
* src/libvirt_private.syms (util.h): Export it.
Based on an initial patch by Hu Tao, with feedback from
Daniel P. Berrange.
Signed-off-by: Eric Blake <eblake@redhat.com>
The socket address APIs in src/util/network.h either take the
form virSocketAddrXXX, virSocketXXX or virSocketXXXAddr.
Sanitize this so everything is virSocketAddrXXXX, and ensure
that the virSocketAddr parameter is always the first one.
* src/util/network.c, src/util/network.h: Santize socket
address API naming
* src/conf/domain_conf.c, src/conf/network_conf.c,
src/conf/nwfilter_conf.c, src/network/bridge_driver.c,
src/nwfilter/nwfilter_ebiptables_driver.c,
src/nwfilter/nwfilter_learnipaddr.c,
src/qemu/qemu_command.c, src/rpc/virnetsocket.c,
src/util/dnsmasq.c, src/util/iptables.c,
src/util/virnetdev.c, src/vbox/vbox_tmpl.c: Update for
API renaming
Following the renaming of the bridge management APIs, we can now
split the source file into 3 corresponding pieces
* src/util/virnetdev.c: APIs for any type of network interface
* src/util/virnetdevbridge.c: APIs for bridge interfaces
* src/util/virnetdevtap.c: APIs for TAP interfaces
* src/util/virnetdev.c, src/util/virnetdev.h,
src/util/virnetdevbridge.c, src/util/virnetdevbridge.h,
src/util/virnetdevtap.c, src/util/virnetdevtap.h: Copied
from bridge.{c,h}
* src/util/bridge.c, src/util/bridge.h: Split into 3 pieces
* src/lxc/lxc_driver.c, src/network/bridge_driver.c,
src/openvz/openvz_driver.c, src/qemu/qemu_command.c,
src/qemu/qemu_conf.h, src/uml/uml_conf.c, src/uml/uml_conf.h,
src/uml/uml_driver.c: Update #include directives
Convert the virNetDevBridgeSetSTP and virNetDevBridgeSetSTPDelay
to use ioctls instead of spawning brctl.
Implement the virNetDevBridgeGetSTP and virNetDevBridgeGetSTPDelay
methods which were declared in the header but never existed
* src/util/bridge.c: Convert to use bridge ioctls instead of brctl
The MTU management APIs are useful to other code inside libvirt,
so should be exposed as non-static APIs.
* src/util/bridge.c, src/util/bridge.h: Expose virNetDevSetMTU,
virNetDevSetMTUFromDevice & virNetDevGetMTU
The existing brXXX APIs in src/util/bridge.h are renamed to
follow one of three different conventions
- virNetDevXXX - operations for any type of interface
- virNetDevBridgeXXX - operations for bridge interfaces
- virNetDevTapXXX - operations for tap interfaces
* src/util/bridge.h, src/util/bridge.c: Rename all APIs
* src/lxc/lxc_driver.c, src/network/bridge_driver.c,
src/qemu/qemu_command.c, src/uml/uml_conf.c,
src/uml/uml_driver.c: Update for API renaming
Currently every caller of the brXXX APIs has to store the returned
errno value and then raise an error message. This results in
inconsistent error messages across drivers, additional burden on
the callers and makes the error reporting inaccurate since it is
hard to distinguish different scenarios from 1 errno value.
* src/util/bridge.c: Raise errors instead of returning errnos
* src/lxc/lxc_driver.c, src/network/bridge_driver.c,
src/qemu/qemu_command.c, src/uml/uml_conf.c,
src/uml/uml_driver.c: Remove error reporting code
The bridge management APIs in src/util/bridge.c require a brControl
object to be passed around. This holds the file descriptor for the
control socket. This extra object complicates use of the API for
only a minor efficiency gain, which is in turn entirely offset by
the need to fork/exec the brctl command for STP configuration.
This patch removes the 'brControl' object entirely, instead opening
the control socket & closing it again within the scope of each method.
The parameter names for the APIs are also made to consistently use
'brname' for bridge device name, and 'ifname' for an interface
device name. Finally annotations are added for non-NULL parameters
and return check validation
* src/util/bridge.c, src/util/bridge.h: Remove brControl object
and update API parameter names & annotations.
* src/lxc/lxc_driver.c, src/network/bridge_driver.c,
src/uml/uml_conf.h, src/uml/uml_conf.c, src/uml/uml_driver.c,
src/qemu/qemu_command.c, src/qemu/qemu_conf.h,
src/qemu/qemu_driver.c: Remove reference to 'brControl' object
MacOS lacks ptsname_r, and gnulib doesn't (yet) provide it.
But we can avoid it altogether, by using gnulib openpty()
instead. Note that we do _not_ want the pt_chown module;
gnulib uses it only to implement a replacement openpty() if
the system lacks both openpty() and granpt(), but all
systems that we currently port to either have at least one of
openpty() and/or grantpt(), or lack ptys altogether. That is,
we aren't porting to any system that requires us to deal with
the hassle of installing a setuid pt_chown helper just to use
gnulib's ability to provide openpty() on obscure platforms.
* .gnulib: Update to latest, for openpty fixes
* bootstrap.conf (gnulib_modules): Add openpty, ttyname_r.
(gnulib_tool_option_extras): Exclude pt_chown module.
* src/util/util.c (virFileOpenTty): Rewrite in terms of openpty
and ttyname_r.
* src/util/util.h (virFileOpenTtyAt): Delete dead prototype.
Building on 64-bit FreeBSD 8.2 complained about a cast between
a pointer and a smaller integer. Going through an intermediate
cast shuts up the compiler.
* src/util/threads-pthread.c (virThreadSelfID): Silence a warning.
The field 'mon' in 'struct tm' gives months 0-11, where as
humans tend to expect months 1-12. Thus the month number
needing adjusting by 1
* src/util/logging.c: Use human friendly month number
commit 27908453 introduces a regression, and it will
cause libvirt crashed when starting network.
The reason is that tapfd may be NULL, but we dereference
it without checking whether it is NULL.
To support "managed" mode of host PCI device, we record the original
states (unbind_from_stub, remove_slot, and reprobe) so that could
reattach the device to host with original driver. But there is no XML
for theses attrs, and thus after daemon is restarted, we lose the
original states. It's easy to reproduce:
1) virsh start domain
2) virsh attach-device dom hostpci.xml (in 'managed' mode)
3) service libvirtd restart
4) virsh destroy domain
You will see the device won't be bound to the original driver
if there was one.
This patch is to solve the problem by introducing internal XML
(won't be dumped to user, only dumped to status XML). The XML is:
<origstates>
<unbind/>
<remove_slot/>
<reprobe/>
</origstates>
Which will be child node of <hostdev><source>...</souce></hostdev>.
(only for PCI device).
A new struct "virDomainHostdevOrigStates" is introduced for the XML,
and the according members are updated when preparing the PCI device.
And function "qemuUpdateActivePciHostdevs" is modified to honor
the original states. Use of qemuGetPciHostDeviceList is removed
in function "qemuUpdateActivePciHostdevs", and the "managed" value of
the device config is honored by the change. This fixes another problem
alongside:
qemuGetPciHostDeviceList set the device as "managed" force
regardless of whether the device is configured as "managed='yes'"
or not in XML, which is not right.
- changed some return 1's to return -1
- changed if (rc) error checks to if (rc < 0)
- fixed some other minor convention violations
I might have missed some. Can fix in another patch or can respin
Signed-off-by: Roopa Prabhu <roprabhu@cisco.com>
Reported-by: Eric Blake <eblake@redhat.com>
Reported-by: Laine Stump <laine@laine.org>
Signed-off-by: Eric Blake <eblake@redhat.com>
This refactors the TAP creation code out of brAddTap into a new
function brCreateTap to allow it to be used on its own. I have also
changed ifSetInterfaceMac to brSetInterfaceMac and exported it since
it is will be needed by code outside of util/bridge.c in the next
patch.
AUTHORS | 1 +
src/libvirt_bridge.syms | 2 +
src/util/bridge.c | 116 +++++++++++++++++++++++++++++++----------------
src/util/bridge.h | 9 ++++
4 files changed, 89 insertions(+), 39 deletions(-)
Every time we write XML into a file we call virEmitXMLWarning to write a
warning that the file is automatically generated. virXMLSaveFile
simplifies this into a single step and makes rewriting existing XML file
safe by using virFileRewrite internally.
When saving config files we just overwrite old content of the file. In
case something fails during that process (e.g. disk gets full) we lose
both old and new content. This patch makes the process more robust by
writing the new content into a separate file and only if that succeeds
the original file is atomically replaced with the new one.
More simplifications possible due to auto-indent. Also,
<bandwidth> within <actual> was only using 6 instead of 8 spaces.
* src/util/network.h (virVirtualPortProfileFormat)
(virBandwidthDefFormat): Alter signature.
* src/util/network.c (virVirtualPortProfileFormat)
(virBandwidthDefFormat): Alter indentation.
(virBandwidthChildDefFormat): Tweak to make use easier.
* src/conf/network_conf.c (virPortGroupDefFormat)
(virNetworkDefFormat): Adjust callers.
* src/conf/domain_conf.c (virDomainNetDefFormat): Likewise.
(virDomainActualNetDefFormat): Likewise, and fix bandwidth
indentation.
The improvements to virBuffer, along with a paradigm shift to pass
the original buffer through rather than creating a second buffer,
allow us to shave off quite a few lines of code.
* src/util/sysinfo.h (virSysinfoFormat): Alter signature.
* src/util/sysinfo.c (virSysinfoFormat, virSysinfoBIOSFormat)
(virSysinfoSystemFormat, virSysinfoProcessorFormat)
(virSysinfoMemoryFormat): Change indentation parameter.
* src/conf/domain_conf.c (virDomainSysinfoDefFormat): Adjust
caller.
* src/qemu/qemu_driver.c (qemuGetSysinfo): Likewise.
Rather than having to adjust all callers in a chain to deal with
indentation, it is nicer to have virBuffer do auto-indentation.
* src/util/buf.h (_virBuffer): Increase size.
(virBufferAdjustIndent, virBufferGetIndent): New prototypes.
* src/libvirt_private.syms (buf.h): Export new functions.
* src/util/buf.c (virBufferAdjustIndent, virBufferGetIndent): New
functions.
(virBufferSetError, virBufferAdd, virBufferAddChar)
(virBufferVasprintf, virBufferStrcat, virBufferURIEncodeString):
Implement auto-indentation.
* tests/virbuftest.c (testBufAutoIndent): Test it.
(testBufInfiniteLoop): Don't rely on internals.
Idea by Daniel P. Berrange.
The next patch wants to add some sanity checking, which would
be a different error than ENOMEM. Many existing callers blindly
report OOM failure if virBuf reports an error, and this will be
wrong in the (unlikely) case that they actually had a usage error
instead; but since the most common error really is ENOMEM, I'm
not going to fix all callers. Meanwhile, new discriminating
callers can react differently depending on what failure happened.
* src/util/buf.c (virBufferSetError): Add parameter.
(virBufferGrow, virBufferVasprintf, virBufferEscapeString)
(virBufferEscapeSexpr, virBufferEscapeShell): Adjust callers.
Although the compiler wasn't complaining (since it was the pointer,
rather than what was being pointed to, that was actually const), it
looks quite suspicious to call a function with an argument labeled
const when the nature of the pointer (virBufferPtr) is hidden behind
a typedef. Dropping const makes the function declarations easier
to read.
* src/util/buf.h: Drop const from all functions that modify buffer
argument.
* src/util/buf.c (virBufferSetError, virBufferAdd)
(virBufferContentAndReset, virBufferFreeAndReset)
(virBufferAsprintf, virBufferVasprintf, virBufferEscapeString)
(virBufferEscapeSexpr, virBufferEscape): Fix fallout.
The glibc ones (intentionally) cannot handle ptys opened in a
devpts not mounted at /dev/pts.
Drop the (un-exported, unused) virFileOpenTtyAt.
Signed-off-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This adds support for a libvirt client configuration file
either /etc/libvirt/libvirt.conf for privileged clients,
or $HOME/.libvirt/libvirt.conf for unprivileged clients.
It allows one parameter
uri_aliases = [
"hail=qemu+ssh://root@hail.cloud.example.com/system",
"sleet=qemu+ssh://root@sleet.cloud.example.com/system",
]
Any call to virConnectOpen with a non-NULL URI will first
attempt to match against the uri_aliases list. An application
can disable this by using VIR_CONNECT_NO_ALIASES
* docs/uri.html.in: Document URI aliases
* include/libvirt/libvirt.h.in: Add VIR_CONNECT_NO_ALIASES
* libvirt.spec.in, mingw32-libvirt.spec.in: Add /etc/libvirt/libvirt.conf
* src/Makefile.am: Install default config file
* src/libvirt.c: Add support for URI aliases
* src/remote/remote_driver.c: Don't try to handle URIs
with no scheme and which clearly are not paths
* src/util/conf.c: Don't raise error on virConfFree(NULL)
* src/xen/xen_driver.c: Don't raise error on URIs
with no scheme
Commit 0472f39 plugged a leak, but introduced another bug:
Actually looks like physfndev is conditionally allocated in getPhysfnDev
Its better to modify getPhysfnDev to allocate physfndev every time.
When failing on starting a domain, it tries to reattach all the PCI
devices defined in the domain conf, regardless of whether the devices
are still used by other domain. This will cause the devices to be deleted
from the list qemu_driver->activePciHostdevs, thus the devices will be
thought as usable even if it's not true. And following commands
nodedev-{reattach,reset} will be successful.
How to reproduce:
1) Define two domains with same PCI device defined in the confs.
2) # virsh start domain1
3) # virsh start domain2
4) # virsh nodedev-reattach $pci_device
You will see the device will be reattached to host successfully.
As pciDeviceReattach just check if the device is still used by
other domain via checking if the device is in list driver->activePciHostdevs,
however, the device is deleted from the list by step 2).
This patch is to prohibit the bug by:
1) Prohibit a domain starting or device attachment right at
preparation period (qemuPrepareHostdevPCIDevices) if the
device is in list driver->activePciHostdevs, which means
it's used by other domain.
2) Introduces a new field for struct _pciDevice, (const char *used_by),
it will be set as the domain name at preparation period,
(qemuPrepareHostdevPCIDevices). Thus we can prohibit deleting
the device from driver->activePciHostdevs if it's still used by
other domain when stopping the domain process.
* src/pci.h (define two internal functions, pciDeviceSetUsedBy and
pciDevceGetUsedBy)
* src/pci.c (new field "const char *used_by" for struct _pciDevice,
implementations for the two new functions)
* src/libvirt_private.syms (Add the two new internal functions)
* src/qemu_hostdev.h (Modify the definition of functions
qemuPrepareHostdevPCIDevices, and qemuDomainReAttachHostdevDevices)
* src/qemu_hostdev.c (Prohibit preparation and don't delete the
device from activePciHostdevs list if it's still used by other domain)
* src/qemu_hotplug.c (Update function usage, as the definitions are
changed)
Signed-off-by: Eric Blake <eblake@redhat.com>
Setting a hostname that cannot be resolved is not the best configuration
but since virGetHostname only calls getaddrinfo to get host's canonical
name and we do not fail if the returned canonical name is NULL or
"localhost", there is no reason why we should fail if getaddrinfo itself
fails.
