If you compile a client --without-polkit, and connect to a URI that needs
polkit auth, the connection will fail with:
$ ./tools/virsh --connect qemu+ssh://crobinso@machine/system
error: failed to connect to the hypervisor
error: authentication failed: unsupported authentication type 2
This is because the client side portion of the polkit handling is
compiled out. However, nothing polkit specific is actually required
of the client.
Fix that error by unconditionally compiling the basic polkit client
handling.
https://bugzilla.redhat.com/show_bug.cgi?id=635529
Since we didn't opt to use one single event for device lifecycle for a
VM we are missing one last event if the device removal failed. This
event will be emitted once we asked to eject the device but for some
reason it is not possible.
I've noticed that these APIs are missing @flags argument. Even
though we don't have a use for them, it's our policy that every
new API must have @flags.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
To use post-copy one has to start the migration with
VIR_MIGRATE_POSTCOPY flag and, while migration is in progress, call
virDomainMigrateStartPostCopy() to switch from pre-copy to post-copy.
Signed-off-by: Cristian Klein <cristiklein@gmail.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The VIR_DOMAIN_EVENT_ID_JOB_COMPLETED event will be triggered once a job
(such as migration) finishes and it will contain statistics for the job
as one would get by calling virDomainGetJobStats. Thanks to this event
it is now possible to get statistics of a completed migration of a
transient domain on the source host.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Make register and unregister functions return void because
we can check the state of callback object beforehand via
virConnectCloseCallbackDataGetCallback. This can be done
without race conditions if we use higher level locks for registering
and unregistering. The fact they return void simplifies
task of consistent registering/unregistering.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Commit 8cd1d54 consolidates both daemon and remote driver typed param
serialization functions. The consolidation now enforces client to use
VIR_TYPED_PARAM_STRING_OKAY flag to properly serialize string parameters, which
server has used for quite some time now. And this caused an issue, since the
commit had not adjusted client remote calls appropriately, thus causing a
failure in blkiotune, numatune and migration APIs (as per Xen CI tests). This
patch adjusts both remote_driver.c and gendispatch.pl to properly address this
issue.
http://lists.xenproject.org/archives/html/xen-devel/2016-02/msg01012.html
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Same as for deserializer, this method might get handy for admin one day.
The major reason for this patch is to stay consistent with idea, i.e.
when deserializer can be shared, why not serializer as well. The only
problem to be solved was that the daemon side serializer uses a code
snippet which handles sparse arrays returned by some APIs as well as
removes any string parameters that can't be returned to older clients.
This patch makes of the new virTypedParameterRemote datatype introduced
by one of the pvious patches.
Since the method is static to remote_driver, it can't even be used by our
daemon. Other than that, it would be useful to be able to use it with admin as
well. This patch uses the new virTypedParameterRemote datatype introduced in
one of previous patches.
Currently, the deserializer is hardcoded into remote_driver which makes
it impossible for admin to use it. One way to achieve a shared implementation
(besides moving the code to another module) would be pass @ret_params_val as a
void pointer as opposed to the remote_typed_param pointer and add a new extra
argument specifying which of those two protocols is being used and typecast
the pointer at the function entry. An example from remote_protocol:
struct remote_typed_param_value {
int type;
union {
int i;
u_int ui;
int64_t l;
uint64_t ul;
double d;
int b;
remote_nonnull_string s;
} remote_typed_param_value_u;
};
typedef struct remote_typed_param_value remote_typed_param_value;
struct remote_typed_param {
remote_nonnull_string field;
remote_typed_param_value value;
};
That would leave us with a bunch of if-then-elses that needed to be used across
the method. This patch takes the other approach using the new datatype
introduced in one of earlier commits.
The VIR_DOMAIN_EVENT_ID_MIGRATION_ITERATION event will be triggered
whenever VIR_DOMAIN_JOB_MEMORY_ITERATION changes its value, i.e.,
whenever a new iteration over guest memory pages is started during
migration.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Some of the protocol files already include handing of the missing int
types such as xdr_uint64_t, some don't. To fix it everywhere, move out
of the appropriate defines to the utils/virxdrdefs.h file and include
it where needed.
Signed-off-by: Roman Bogorodskiy <bogorodskiy@gmail.com>
Well, in 8ad126e6 we tried to fix a memory corruption problem.
However, the fix was not as good as it could be. I mean, the
commit has one line more than it should. I've noticed this output
just recently:
# ./run valgrind --leak-check=full --show-reachable=yes ./tools/virsh domblklist gentoo
==17019== Memcheck, a memory error detector
==17019== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==17019== Using Valgrind-3.10.1 and LibVEX; rerun with -h for copyright info
==17019== Command: /home/zippy/work/libvirt/libvirt.git/tools/.libs/virsh domblklist gentoo
==17019==
Target Source
------------------------------------------------
fda /var/lib/libvirt/images/fd.img
vda /var/lib/libvirt/images/gentoo.qcow2
hdc /home/zippy/tmp/install-amd64-minimal-20150402.iso
==17019== Thread 2:
==17019== Invalid read of size 4
==17019== at 0x4EFF5B4: virObjectUnref (virobject.c:258)
==17019== by 0x5038CFF: remoteClientCloseFunc (remote_driver.c:552)
==17019== by 0x5069D57: virNetClientCloseLocked (virnetclient.c:685)
==17019== by 0x506C848: virNetClientIncomingEvent (virnetclient.c:1852)
==17019== by 0x5082136: virNetSocketEventHandle (virnetsocket.c:1913)
==17019== by 0x4ECD64E: virEventPollDispatchHandles (vireventpoll.c:509)
==17019== by 0x4ECDE02: virEventPollRunOnce (vireventpoll.c:658)
==17019== by 0x4ECBF00: virEventRunDefaultImpl (virevent.c:308)
==17019== by 0x130386: vshEventLoop (vsh.c:1864)
==17019== by 0x4F1EB07: virThreadHelper (virthread.c:206)
==17019== by 0xA8462D3: start_thread (in /lib64/libpthread-2.20.so)
==17019== by 0xAB441FC: clone (in /lib64/libc-2.20.so)
==17019== Address 0x139023f4 is 4 bytes inside a block of size 240 free'd
==17019== at 0x4C2B1F0: free (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==17019== by 0x4EA8949: virFree (viralloc.c:582)
==17019== by 0x4EFF6D0: virObjectUnref (virobject.c:273)
==17019== by 0x4FE74D6: virConnectClose (libvirt.c:1390)
==17019== by 0x13342A: virshDeinit (virsh.c:406)
==17019== by 0x134A37: main (virsh.c:950)
The problem is, when registering remoteClientCloseFunc(), it's
conn->closeCallback which is ref'd. But in the function itself
it's conn->closeCallback->conn what is unref'd. This is causing
imbalance in reference counting. Moreover, there's no need for
the remote driver to increase/decrease conn refcount since it's
not used anywhere. It's just merely passed to client registered
callback. And for that purpose it's correctly ref'd in
virConnectRegisterCloseCallback() and then unref'd in
virConnectUnregisterCloseCallback().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Also, among with this new API new ACL that restricts rename
capability is invented too.
Signed-off-by: Tomas Meszaros <exo@tty.sk>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The remoteDomainOpenGraphicsFD method was using the wrong RPC
arg struct remote_domain_open_graphics_args instead of
remote_domain_open_graphics_fd_args. Fortunately both structs
had identical contents so there was no functional bug, but to
avoid confusing future maintainers, we should fix it.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
By default, getaddrinfo() will return addresses for both
IPv4 and IPv6 if both protocols are enabled, and so the
RPC code will listen/connect to both protocols too. There
may be cases where it is desirable to restrict this to
just one of the two protocols, so add an 'int family'
parameter to all the TCP related APIs.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
For setting passwords of users inside the domain.
With the VIR_DOMAIN_PASSWORD_ENCRYPTED flag set, the password
is assumed to be already encrypted by the method required
by the guest OS.
https://bugzilla.redhat.com/show_bug.cgi?id=1174177
Not all NICs (esp. the virtual ones like TUN) must have a hardware
address. Teach our RPC that it's possible.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
daemon/remote.c
* Define remoteSerializeDomainInterface, remoteDispatchDomainInterfaceAddresses
src/remote/remote_driver.c
* Define remoteDomainInterfaceAddresses
src/remote/remote_protocol.x
* New RPC procedure: REMOTE_PROC_DOMAIN_INTERFACE_ADDRESSES
* Define structs remote_domain_ip_addr, remote_domain_interface,
remote_domain_interfaces_addresse_args, remote_domain_interface_addresses_ret
* Introduce upper bounds (to handle DoS attacks):
REMOTE_DOMAIN_INTERFACE_MAX = 2048
REMOTE_DOMAIN_IP_ADDR_MAX = 2048
Restrictions on the maximum number of aliases per interface were
removed after kernel v2.0, and theoretically, at present, there
are no upper limits on number of interfaces per virtual machine
and on the number of IP addresses per interface.
src/remote_protocol-structs
* New structs added
Signed-off-by: Nehal J Wani <nehaljw.kkd1@gmail.com>
Not all files we want to find using virFileFindResource{,Full} are
generated when libvirt is built, some of them (such as RNG schemas) are
distributed with sources. The current API was not able to find source
files if libvirt was built in VPATH.
Both RNG schemas and cpu_map.xml are distributed in source tarball.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
For stateless, client side drivers, it is never correct to
probe for secondary drivers. It is only ever appropriate to
use the secondary driver that is associated with the
hypervisor in question. As a result the ESX & HyperV drivers
have both been forced to do hacks where they register no-op
drivers for the ones they don't implement.
For stateful, server side drivers, we always just want to
use the same built-in shared driver. The exception is
virtualbox which is really a stateless driver and so wants
to use its own server side secondary drivers. To deal with
this virtualbox has to be built as 3 separate loadable
modules to allow registration to work in the right order.
This can all be simplified by introducing a new struct
recording the precise set of secondary drivers each
hypervisor driver wants
struct _virConnectDriver {
virHypervisorDriverPtr hypervisorDriver;
virInterfaceDriverPtr interfaceDriver;
virNetworkDriverPtr networkDriver;
virNodeDeviceDriverPtr nodeDeviceDriver;
virNWFilterDriverPtr nwfilterDriver;
virSecretDriverPtr secretDriver;
virStorageDriverPtr storageDriver;
};
Instead of registering the hypervisor driver, we now
just register a virConnectDriver instead. This allows
us to remove all probing of secondary drivers. Once we
have chosen the primary driver, we immediately know the
correct secondary drivers to use.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
A bunch of code is wrapped in #if WITH_LIBVIRTD in order to
enable the virStateDriver to be disabled when libvirtd is not
built. Disabling this code doesn't have any real functional
benefit beyond removing 1 pointer from the virConnectPtr struct,
while having a cost of many more conditionals.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The ACL check didn't check the VIR_DOMAIN_XML_SECURE flag and the
appropriate permission for it. Found via code inspection while fixing
permissions for save images.
The virDomainDefineXML method is one of the few that still lacks
an 'unsigned int flags' parameter. This will be needed for adding
XML validation to this API. virDomainCreateXML fortunately already
has flags.
Since virDomainSnapshotFree will call virObjectUnref anyway, let's just use
that directly so as to avoid the possibility that we inadvertently clear out
a pending error message when using the public API.
Since virInterfaceFree will call virObjectUnref anyway, let's just use that
directly so as to avoid the possibility that we inadvertently clear out
a pending error message when using the public API.
Since virNWFilterFree will call virObjectUnref anyway, let's just use that
directly so as to avoid the possibility that we inadvertently clear out
a pending error message when using the public API.
Since virSecretFree will call virObjectUnref anyway, let's just use that
directly so as to avoid the possibility that we inadvertently clear out
a pending error message when using the public API.
Since virStreamFree will call virObjectUnref anyway, let's just use that
directly so as to avoid the possibility that we inadvertently clear out
a pending error message when using the public API.
Since virStoragePoolFree will call virObjectUnref anyway, let's just use that
directly so as to avoid the possibility that we inadvertently clear out
a pending error message when using the public API.
Since virStorageVolFree will call virObjectUnref anyway, let's just use that
directly so as to avoid the possibility that we inadvertently clear out
a pending error message when using the public API.
Since virNodeDeviceFree will call virObjectUnref anyway, let's just use that
directly so as to avoid the possibility that we inadvertently clear out
a pending error message when using the public API.
Since virNetworkFree will call virObjectUnref anyway, let's just use that
directly so as to avoid the possibility that we inadvertently clear out
a pending error message when using the public API.
Since virDomainFree will call virObjectUnref anyway, let's just use that
directly so as to avoid the possibility that we inadvertently clear out
a pending error message when using the public API.
As qemu is now able to notify us about change of the channel state used
for communication with the guest agent we now can more precisely track
the state of the guest agent.
To allow notifying management apps this patch implements a new event
that will be triggered on changes of the guest agent state.
Since the secondary drivers are only active when the primary
driver is also the remote driver, there is no need to use the
different type specific privateData fields.
The remote driver has had a long term hack to deal with the fact
that the old Xen driver worked outside libvirtd, but the rest
of the drivers worked inside. So you could have a local hypervisor
driver but everything else go via the remote driver. The Xen driver
long ago moved inside libvirtd, so this hack is no longer needed.
Thus we should open use the remote driver for secondary drivers
if the primary driver is already the remote driver.
Commit 28f8dfd (v1.0.0) introduced a security hole: in at least
the qemu implementation of virDomainGetXMLDesc, the use of the
flag VIR_DOMAIN_XML_MIGRATABLE (which is usable from a read-only
connection) triggers the implicit use of VIR_DOMAIN_XML_SECURE
prior to calling qemuDomainFormatXML. However, the use of
VIR_DOMAIN_XML_SECURE is supposed to be restricted to read-write
clients only. This patch treats the migratable flag as requiring
the same permissions, rather than analyzing what might break if
migratable xml no longer includes secret information.
Fortunately, the information leak is low-risk: all that is gated
by the VIR_DOMAIN_XML_SECURE flag is the VNC connection password;
but VNC passwords are already weak (FIPS forbids their use, and
on a non-FIPS machine, anyone stupid enough to trust a max-8-byte
password sent in plaintext over the network deserves what they
get). SPICE offers better security than VNC, and all other
secrets are properly protected by use of virSecret associations
rather than direct output in domain XML.
* src/remote/remote_protocol.x (REMOTE_PROC_DOMAIN_GET_XML_DESC):
Tighten rules on use of migratable flag.
* src/libvirt-domain.c (virDomainGetXMLDesc): Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
The remote call actually doesn't free the arguments array so we leak
memory in case a domain list is specified. As the remote domain list
array consists only of stolen pointers from the actual domain objects
it's sufficient just to free the array.
Valgrind message:
==1081452== 64 bytes in 1 blocks are definitely lost in loss record 632 of 726
==1081452== at 0x4C296D0: calloc (vg_replace_malloc.c:618)
==1081452== by 0x4EA5CB4: virAllocN (viralloc.c:191)
==1081452== by 0x505D21E: remoteConnectGetAllDomainStats (remote_driver.c:7785)
==1081452== by 0x50081AA: virDomainListGetStats (libvirt-domain.c:11080)
==1081452== by 0x155249: cmdDomstats (virsh-domain-monitor.c:2147)
==1081452== by 0x12FB73: vshCommandRun (virsh.c:1935)
==1081452== by 0x133FEB: main (virsh.c:3719)
Currently remote driver only initializes partial fields of
remote_connect_get_all_domain_stats_args. But xdr_array()
will check the uninitialised field 'doms_val'.
For safty reason, memset all fields of args is better.
Fix the following error from valgrind, like:
==30515== 1 errors in context 1 of 3:
==30515== Conditional jump or move depends on uninitialised value(s)
==30515== at 0x85E9402: xdr_array (xdr_array.c:88)
==30515== by 0x4FD8FC9: xdr_remote_connect_get_all_domain_stats_args (remote_protocol.c:6473)
==30515== by 0x4FE72F2: virNetMessageEncodePayload (virnetmessage.c:350)
==30515== by 0x4FDD21C: virNetClientProgramCall (virnetclientprogram.c:326)
==30515== by 0x4FB4D01: callFull.isra.2 (remote_driver.c:6667)
==30515== by 0x4FCBD45: call (remote_driver.c:6689)
==30515== by 0x4FCBD45: remoteConnectGetAllDomainStats (remote_driver.c:7793)
==30515== by 0x4FA0E75: virConnectGetAllDomainStats (libvirt.c:21678)
==30515== by 0x147FD1: cmdDomstats (virsh-domain-monitor.c:2148)
==30515== by 0x13006B: vshCommandRun (virsh.c:1915)
==30515== by 0x12A9E1: main (virsh.c:3699)
Signed-off-by: Jincheng Miao <jmiao@redhat.com>
To prepare for introducing a single global driver, rename the
virDriver struct to virHypervisorDriver and the registration
API to virRegisterHypervisorDriver()
There's no one to free() it anyway. Instead, we can just pass the
provided array pointer directly.
==20039== 48 bytes in 4 blocks are definitely lost in loss record 658 of 787
==20039== at 0x4C2A700: calloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==20039== by 0x4EA661F: virAllocN (viralloc.c:191)
==20039== by 0x50386EF: remoteNodeGetFreePages (remote_driver.c:7625)
==20039== by 0x5003504: virNodeGetFreePages (libvirt.c:21379)
==20039== by 0x154625: cmdFreepages (virsh-host.c:374)
==20039== by 0x12F718: vshCommandRun (virsh.c:1935)
==20039== by 0x1339FB: main (virsh.c:3747)
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
It would be nice to also print a params pointer and number of params in
the debug message and the previous limit for number of params in the rpc
message was too large. The 2048 params will be enough for future events.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
A long time ago in a galaxy far, far away it has been decided
that libvirt will manage not only domains but host as well. And
with my latest work on qemu driver supporting huge pages, we miss
the cherry on top: an API to allocate huge pages on the run.
Currently users are forced to log into the host and adjust the
huge pages pool themselves. However, with this API the problem
is gone - they can both size up and size down the pool.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This new event will use typedParameters to expose what has been actually
updated and the reason is that we can in the future extend any tunable
values or add new tunable values. With typedParameters we don't have to
worry about creating some other events, we will just use this universal
event to inform user about updates.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Clean up all _virDomainMemoryStat.
Signed-off-by: James <james.wangyufei@huawei.com>
Signed-off-by: Wang Rui <moon.wangrui@huawei.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Since 98b9acf5aa
This was a false positive where Coverity was complaining that the
remoteDeserializeTypedParameters() could allocate 'params', but
none of the callers could return the allocated memory back to their
caller since on input the param was passed by value. Additionally,
the flow of the code was that if params was NULL on entry, then each
function would return 'nparams' as the number of params entries the
caller would need to allocate in order to call the function again
with 'nparams' and 'params' being set. By the time the deserialize
routine was called params would have something. For other callers
where the 'params' was passed by reference as NULL since it's expected
that the deserialize allocates the memory and then have that passed
back to the original caller to dispose there was no Coverity issue.
As it turns out Coverity didn't quite seem to understand the
relationship between 'nparams' and 'params'; however, if the
!userAllocated path of the deserialize code compared against
limit in any manner, then the Coverity error went away which
was quite strange, but useful.
As it turns out one code path remoteDomainGetJobStats had a
comparison against 'limit' while another remoteConnectGetAllDomainStats
did not assuming that limit would be checked. So I refactored the
code a bit to cause the limit check to occur in deserialize for
both conditions and then only made the check of current returned
size against the incoming *nparams fail the non allocation case.
This means the job code doesn't need to check the limit any more,
while the stats code now does check the limit.
Additionally, to help perhaps decipher which of the various
callers to the deserialize code caused the failure - I used
a #define to pass the __FUNCNAME__ of the caller along so that
error messages could have something like:
error: remoteConnectGetAllDomainStats: too many parameters '2' for nparams '0'
error: Reconnected to the hypervisor
(it's a contrived error just to show the funcname in the error)
Fairly straightforward - I got lucky that the generated functions
worked out of the box :)
* src/remote/remote_protocol.x (remote_domain_block_copy_args):
New struct.
(REMOTE_PROC_DOMAIN_BLOCK_COPY): New RPC.
* src/remote/remote_driver.c (remote_driver): Wire it up.
* src/remote_protocol-structs: Regenerate.
Signed-off-by: Eric Blake <eblake@redhat.com>
Let's fix this before we bake in a painful API. Since we know
that we have exactly one non-negative fd on success, we might
as well return the fd directly instead of forcing the user to
pass in a pointer. Furthermore, I found some memory and fd
leaks while reviewing the code - the idea is that on success,
libvirtd will have handed two fds in two different directions:
one to qemu, and one to the RPC client.
* include/libvirt/libvirt.h.in (virDomainOpenGraphicsFD): Drop
unneeded parameter.
* src/driver.h (virDrvDomainOpenGraphicsFD): Likewise.
* src/libvirt.c (virDomainOpenGraphicsFD): Adjust interface to
return fd directly.
* daemon/remote.c (remoteDispatchDomainOpenGraphicsFd): Adjust
semantics.
* src/qemu/qemu_driver.c (qemuDomainOpenGraphicsFD): Likewise,
and plug fd leak.
* src/remote/remote_driver.c (remoteDomainOpenGraphicsFD):
Likewise, and plug memory and fd leak.
Signed-off-by: Eric Blake <eblake@redhat.com>
In many places we define a variable as a 'const char *' when in fact
we modify it just a few lines below. Or even free it. We should not do
that.
There's one exception though, in xenSessionFree() xenapi_utils.c. We
are freeing the xen_session structure which is defined in
xen/api/xen_common.h public header. The structure contains session_id
which is type of 'const char *' when in fact it should have been just
'char *'. So I'm leaving this unmodified, just noticing the fact in
comment.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Instead of maintaining two very similar APIs, add the "@mac" parameter
to virNetworkGetDHCPLeases and kill virNetworkGetDHCPLeasesForMAC. Both
of those functions would return data the same way, so making @mac an
optional filter simplifies a lot of stuff.
The aim of the API is to get information on number of free pages
on the system. The API behaves similar to the
virNodeGetCellsFreeMemory(). User passes starting NUMA cell, the
count of nodes that he's interested in, pages sizes (yes,
multiple sizes can be queried at once) and the counts are
returned in an array.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
When the block job event was first added, it was for block pull,
where the active layer of the disk remains the same name. It was
also in a day where we only cared about local files, and so we
always had a canonical absolute file name. But two things have
changed since then: we now have network disks, where determining
a single absolute string does not really make sense; and we have
two-phase jobs (copy and active commit) where the name of the
active layer changes between the first event (ready, on the old
name) and second (complete, on the pivoted name).
Adam Litke reported that having an unstable string between events
makes life harder for clients. Furthermore, all of our API that
operate on a particular disk of a domain accept multiple strings:
not only the absolute name of the active layer, but also the
destination device name (such as 'vda'). As this latter name is
stable, even for network sources, it serves as a better string
to supply in block job events.
But backwards-compatibility demands that we should not change the
name handed to users unless they explicitly request it. Therefore,
this patch adds a new event, BLOCK_JOB_2 (alas, I couldn't think of
any nicer name - but at least Migrate2 and Migrate3 are precedent
for a number suffix). We must double up on emitting both old-style
and new-style events according to what clients have registered for
(see also how IOError and IOErrorReason emits double events, but
there the difference was a larger struct rather than changed
meaning of one of the struct members).
Unfortunately, adding a new event isn't something that can easily
be broken into pieces, so the commit is rather large.
* include/libvirt/libvirt.h.in (virDomainEventID): Add a new id
for VIR_DOMAIN_EVENT_ID_BLOCK_JOB_2.
(virConnectDomainEventBlockJobCallback): Document new semantics.
* src/conf/domain_event.c (_virDomainEventBlockJob): Rename field,
to ensure we catch all clients.
(virDomainEventBlockJobNew): Add parameter.
(virDomainEventBlockJobDispose)
(virDomainEventBlockJobNewFromObj)
(virDomainEventBlockJobNewFromDom)
(virDomainEventDispatchDefaultFunc): Adjust clients.
(virDomainEventBlockJob2NewFromObj)
(virDomainEventBlockJob2NewFromDom): New functions.
* src/conf/domain_event.h: Add new prototypes.
* src/libvirt_private.syms (domain_event.h): Export new functions.
* src/qemu/qemu_driver.c (qemuDomainBlockJobImpl): Generate two
different events.
* src/qemu/qemu_process.c (qemuProcessHandleBlockJob): Likewise.
* src/remote/remote_protocol.x
(remote_domain_event_block_job_2_msg): New struct.
(REMOTE_PROC_DOMAIN_EVENT_BLOCK_JOB_2): New RPC.
* src/remote/remote_driver.c
(remoteDomainBuildEventBlockJob2): New handler.
(remoteEvents): Register new event.
* daemon/remote.c (remoteRelayDomainEventBlockJob2): New handler.
(domainEventCallbacks): Register new event.
* tools/virsh-domain.c (vshEventCallbacks): Likewise.
(vshEventBlockJobPrint): Adjust client.
* src/remote_protocol-structs: Regenerate.
Signed-off-by: Eric Blake <eblake@redhat.com>
During guest migration, if the domain xml is bigger than 16384 which is
easily possible for a guest with good number of disks, message encode fails
for xdr_remote_domain_migrate_perform3_ret().
So, Increase the COOKIE_MAX to STRING_MAX value.
Signed-off-by: Shivaprasad G Bhat <shivaprasadbhat@gmail.com>
These APIs allow users to get or set time in a domain, which may come
handy if the domain has been resumed just recently and NTP is not
configured or hasn't kicked in yet and the guest is running
something time critical. In addition, NTP may refuse to re-set the clock
if the skew is too big.
In addition, new ACL attribute is introduced 'set_time'.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
New rules are added in fixup_name in gendispatch.pl to keep the name
FSFreeze and FSThaw. This adds a new ACL permission 'fs_freeze',
which is also applied to VIR_DOMAIN_SNAPSHOT_CREATE_QUIESCE flag.
Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama@hds.com>
Acked-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Make the remote driver use virFileFindResource to find the
libvirt daemon path, so that it executes the in-builddir
daemon if run from source tree.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
--memory-only option is introduced without compression supported. Now qemu
has support for dumping domain's memory in kdump-compressed format. This
patch adds a new virDomainCoreDumpWithFormat API, so that the format in
which qemu dumps domain's memory can be specified.
Signed-off-by: Qiao Nuohan <qiaonuohan@cn.fujitsu.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
These are the first async events in the qemu protocol, so this
patch looks rather big compared to most RPC additions. However,
a large majority of this patch is just mechanical copy-and-paste
from recently-added network events. It didn't help that this
is also the first virConnect rather than virDomain prefix
associated with a qemu-specific API.
* src/remote/qemu_protocol.x (qemu_*_domain_monitor_event_*): New
structs and RPC messages.
* src/rpc/gendispatch.pl: Adjust naming conventions.
* daemon/libvirtd.h (daemonClientPrivate): Track qemu events.
* daemon/remote.c (remoteClientFreeFunc): Likewise.
(remoteRelayDomainQemuMonitorEvent)
(qemuDispatchConnectDomainMonitorEventRegister)
(qemuDispatchConnectDomainMonitorEventDeregister): New functions.
* src/remote/remote_driver.c (qemuEvents): Handle qemu events.
(doRemoteOpen): Register for events.
(remoteNetworkBuildEventLifecycle)
(remoteConnectDomainQemuMonitorEventRegister)
(remoteConnectDomainQemuMonitorEventDeregister): New functions.
* src/qemu_protocol-structs: Regenerate.
Signed-off-by: Eric Blake <eblake@redhat.com>
Any source file which calls the logging APIs now needs
to have a VIR_LOG_INIT("source.name") declaration at
the start of the file. This provides a static variable
of the virLogSource type.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Thre was a syntax error in checking virRegisterStateDriver in
the remote driver, and bogus checking of a void return type
of virDomainConfNWFilterRegister in nwfilter.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Coverity found an issue in lxc_driver and uml_driver that we don't
check the return value of register functions.
I've also updated all other places and unify the way we check the
return value.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Commit 57ddcc23 (v0.9.11) introduced the pmwakeup event, with
an optional 'reason' field reserved for possible future expansion.
But it failed to wire the field through RPC, so even if we do
add a reason in the future, we will be unable to get it back
to the user.
Worse, commit 7ba5defb (v1.0.0) repeated the same mistake with
the pmsuspend_disk event.
As long as we are adding new RPC calls, we might as well fix
the events to actually match the signature so that we don't have
to add yet another RPC in the future if we do decide to start
using the reason field.
* src/remote/remote_protocol.x
(remote_domain_event_callback_pmwakeup_msg)
(remote_domain_event_callback_pmsuspend_msg)
(remote_domain_event_callback_pmsuspend_disk_msg): Add reason
field.
* daemon/remote.c (remoteRelayDomainEventPMWakeup)
(remoteRelayDomainEventPMSuspend)
(remoteRelayDomainEventPMSuspendDisk): Pass reason to client.
* src/conf/domain_event.h (virDomainEventPMWakeupNewFromDom)
(virDomainEventPMSuspendNewFromDom)
(virDomainEventPMSuspendDiskNewFromDom): Require additional
parameter.
* src/conf/domain_event.c (virDomainEventPMClass): New class.
(virDomainEventPMDispose): New function.
(virDomainEventPMWakeupNew*, virDomainEventPMSuspendNew*)
(virDomainEventPMSuspendDiskNew*)
(virDomainEventDispatchDefaultFunc): Use new class.
* src/remote/remote_driver.c (remoteDomainBuildEvent*PM*): Pass
reason through.
* src/remote_protocol-structs: Regenerate.
Signed-off-by: Eric Blake <eblake@redhat.com>
Following the patterns established by lifecycle events, this
creates all the new RPC calls needed to pass callback IDs
for every domain event, and changes the limits in client and
server codes to use modern style when possible.
I've tested all combinations: both 'old client and new server'
and 'new client and old server' continue to work with the old
RPCs, and 'new client and new server' benefit from server-side
filtering with the new RPCs.
* src/remote/remote_protocol.x (REMOTE_PROC_DOMAIN_EVENT_*): Add
REMOTE_PROC_DOMAIN_EVENT_CALLBACK_* counterparts.
* daemon/remote.c (remoteRelayDomainEvent*): Send callbackID via
newer RPC when used with new-style registration.
(remoteDispatchConnectDomainEventCallbackRegisterAny): Extend to
cover all domain events.
* src/remote/remote_driver.c (remoteDomainBuildEvent*): Add new
Callback and Helper functions.
(remoteEvents): Match order of RPC numbers, register new handlers.
(remoteConnectDomainEventRegisterAny)
(remoteConnectDomainEventDeregisterAny): Extend to cover all
domain events.
* src/remote_protocol-structs: Regenerate.
Signed-off-by: Eric Blake <eblake@redhat.com>
The counterpart to the server RPC additions; here, a single
function can serve both old and new calls, while incoming
events must be serviced by two different functions. Again,
some wise choices in our XDR made it easier to share code
managing similar events.
While this only supports lifecycle events, it covers the
harder part of how Register and RegisterAny interact; the
remaining 15 events will be a mechanical change in a later
patch. For Register, we now have a callbackID locally for
more efficient cleanup if the RPC fails; we also prefer to
use the newer RPC where we know it is supported (the older
RPC must be used if we don't know if RegisterAny is
supported).
* src/remote/remote_driver.c (remoteEvents): Register new RPC
event handler.
(remoteDomainBuildEventLifecycle): Move guts...
(remoteDomainBuildEventLifecycleHelper): ...here.
(remoteDomainBuildEventCallbackLifecycle): New function.
(remoteConnectDomainEventRegister)
(remoteConnectDomainEventDeregister)
(remoteConnectDomainEventRegisterAny)
(remoteConnectDomainEventDeregisterAny): Use new RPC when supported.
We want to convert over to server-side events, even for older
APIs. To do that, the client side of the remote driver wants
to distinguish between legacy virConnectDomainEventRegister and
normal virConnectDomainEventRegisterAny, while knowing the
client callbackID and the server's serverID for both types of
registration. The client also needs to probe whether the
server supports server-side filtering. However, for ease of
review, we don't actually use the new RPCs until a later patch.
* src/conf/object_event_private.h (virObjectEventStateCallbackID):
Add parameter.
* src/conf/object_event.c (virObjectEventCallbackListAddID)
(virObjectEventStateRegisterID): Separate legacy from callbackID.
(virObjectEventStateCallbackID): Pass through parameter.
(virObjectEventCallbackLookup): Let legacy and global domain
lifecycle events share a common remoteID.
* src/conf/network_event.c (virNetworkEventStateRegisterID):
Update caller.
* src/conf/domain_event.c (virDomainEventStateRegister)
(virDomainEventStateRegisterID, virDomainEventStateDeregister):
Likewise.
(virDomainEventStateRegisterClient)
(virDomainEventStateCallbackID): Implement new functions.
* src/conf/domain_event.h (virDomainEventStateRegisterClient)
(virDomainEventStateCallbackID): New prototypes.
* src/remote/remote_driver.c (private_data): Add field.
(doRemoteOpen): Probe server feature.
(remoteConnectDomainEventRegister)
(remoteConnectDomainEventRegisterAny): Use new function.
Signed-off-by: Eric Blake <eblake@redhat.com>
This patch adds some new RPC call numbers, but for ease of review,
they sit idle until a later patch adds the client counterpart to
drive the new RPCs. Also for ease of review, I limited this patch
to just the lifecycle event; although converting the remaining
15 domain events will be quite mechanical. On the server side,
we have to have a function per RPC call, largely with duplicated
bodies (the key difference being that we store in our callback
opaque pointer whether events should be fired with old or new
style); meanwhile, a single function can drive multiple RPC
messages. With a strategic choice of XDR struct layout, we can
make the event generation code for both styles fairly compact.
I debated about adding a tri-state witness variable per
connection (values 'unknown', 'legacy', 'modern'). It would start
as 'unknown', move to 'legacy' if any RPC call is made to a legacy
event call, and move to 'modern' if the feature probe is made;
then the event code could issue an error if the witness state is
incorrect (a legacy RPC call while in 'modern', a modern RPC call
while in 'unknown' or 'legacy', and a feature probe while in
'legacy' or 'modern'). But while it might prevent odd behavior
caused by protocol fuzzing, I don't see that it would prevent
any security holes, so I considered it bloat.
Note that sticking @acl markers on the new RPCs generates unused
functions in access/viraccessapicheck.c, because there is no new
API call that needs to use the new checks; however, having a
consistent .x file is worth the dead code.
* src/libvirt_internal.h (VIR_DRV_FEATURE_REMOTE_EVENT_CALLBACK):
New feature.
* src/remote/remote_protocol.x
(REMOTE_PROC_CONNECT_DOMAIN_EVENT_CALLBACK_REGISTER_ANY)
(REMOTE_PROC_CONNECT_DOMAIN_EVENT_CALLBACK_DEREGISTER_ANY)
(REMOTE_PROC_DOMAIN_EVENT_CALLBACK_LIFECYCLE): New RPCs.
* daemon/remote.c (daemonClientCallback): Add field.
(remoteDispatchConnectDomainEventCallbackRegisterAny)
(remoteDispatchConnectDomainEventCallbackDeregisterAny): New
functions.
(remoteDispatchConnectDomainEventRegisterAny)
(remoteDispatchConnectDomainEventDeregisterAny): Mark legacy use.
(remoteRelayDomainEventLifecycle): Change message based on legacy
or new use.
(remoteDispatchConnectSupportsFeature): Advertise new feature.
* src/remote_protocol-structs: Regenerate.
Signed-off-by: Eric Blake <eblake@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1058839
Commit f9f56340 for CVE-2014-0028 almost had the right idea - we
need to check the ACL rules to filter which events to send. But
it overlooked one thing: the event dispatch queue is running in
the main loop thread, and therefore does not normally have a
current virIdentityPtr. But filter checks can be based on current
identity, so when libvirtd.conf contains access_drivers=["polkit"],
we ended up rejecting access for EVERY event due to failure to
look up the current identity, even if it should have been allowed.
Furthermore, even for events that are triggered by API calls, it
is important to remember that the point of events is that they can
be copied across multiple connections, which may have separate
identities and permissions. So even if events were dispatched
from a context where we have an identity, we must change to the
correct identity of the connection that will be receiving the
event, rather than basing a decision on the context that triggered
the event, when deciding whether to filter an event to a
particular connection.
If there were an easy way to get from virConnectPtr to the
appropriate virIdentityPtr, then object_event.c could adjust the
identity prior to checking whether to dispatch an event. But
setting up that back-reference is a bit invasive. Instead, it
is easier to delay the filtering check until lower down the
stack, at the point where we have direct access to the RPC
client object that owns an identity. As such, this patch ends
up reverting a large portion of the framework of commit f9f56340.
We also have to teach 'make check' to special-case the fact that
the event registration filtering is done at the point of dispatch,
rather than the point of registration. Note that even though we
don't actually use virConnectDomainEventRegisterCheckACL (because
the RegisterAny variant is sufficient), we still generate the
function for the purposes of documenting that the filtering
takes place.
Also note that I did not entirely delete the notion of a filter
from object_event.c; I still plan on using that for my upcoming
patch series for qemu monitor events in libvirt-qemu.so. In
other words, while this patch changes ACL filtering to live in
remote.c and therefore we have no current client of the filtering
in object_event.c, the notion of filtering in object_event.c is
still useful down the road.
* src/check-aclrules.pl: Exempt event registration from having to
pass checkACL filter down call stack.
* daemon/remote.c (remoteRelayDomainEventCheckACL)
(remoteRelayNetworkEventCheckACL): New functions.
(remoteRelay*Event*): Use new functions.
* src/conf/domain_event.h (virDomainEventStateRegister)
(virDomainEventStateRegisterID): Drop unused parameter.
* src/conf/network_event.h (virNetworkEventStateRegisterID):
Likewise.
* src/conf/domain_event.c (virDomainEventFilter): Delete unused
function.
* src/conf/network_event.c (virNetworkEventFilter): Likewise.
* src/libxl/libxl_driver.c: Adjust caller.
* src/lxc/lxc_driver.c: Likewise.
* src/network/bridge_driver.c: Likewise.
* src/qemu/qemu_driver.c: Likewise.
* src/remote/remote_driver.c: Likewise.
* src/test/test_driver.c: Likewise.
* src/uml/uml_driver.c: Likewise.
* src/vbox/vbox_tmpl.c: Likewise.
* src/xen/xen_driver.c: Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
I noticed that we allow virDomainGetVcpusFlags even for read-only
connections, but that with a flag, it can require guest agent
interaction. It is feasible that a malicious guest could
intentionally abuse the replies it sends over the guest agent
connection to possibly trigger a bug in libvirt's JSON parser,
or withhold an answer so as to prevent the use of the agent
in a later command such as a shutdown request. Although we
don't know of any such exploits now (and therefore don't mind
posting this patch publicly without trying to get a CVE assigned),
it is better to err on the side of caution and explicitly require
full access to any domain where the API requires guest interaction
to operate correctly.
I audited all commands that are marked as conditionally using a
guest agent. Note that at least virDomainFSTrim is documented
as needing a guest agent, but that such use is unconditional
depending on the hypervisor (so the existing domain:fs_trim ACL
should be sufficient there, rather than also requirng domain:write).
But when designing future APIs, such as the plans for obtaining
a domain's IP addresses, we should copy the approach of this patch
in making interaction with the guest be specified via a flag, and
use that flag to also require stricter access checks.
* src/libvirt.c (virDomainGetVcpusFlags): Forbid guest interaction
on read-only connection.
(virDomainShutdownFlags, virDomainReboot): Improve docs on agent
interaction.
* src/remote/remote_protocol.x
(REMOTE_PROC_DOMAIN_SNAPSHOT_CREATE_XML)
(REMOTE_PROC_DOMAIN_SET_VCPUS_FLAGS)
(REMOTE_PROC_DOMAIN_GET_VCPUS_FLAGS, REMOTE_PROC_DOMAIN_REBOOT)
(REMOTE_PROC_DOMAIN_SHUTDOWN_FLAGS): Require domain:write for any
conditional use of a guest agent.
* src/xen/xen_driver.c: Fix clients.
* src/libxl/libxl_driver.c: Likewise.
* src/uml/uml_driver.c: Likewise.
* src/qemu/qemu_driver.c: Likewise.
* src/lxc/lxc_driver.c: Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
Ever since ACL filtering was added in commit 7639736 (v1.1.1), a
user could still use event registration to obtain access to a
domain that they could not normally access via virDomainLookup*
or virConnectListAllDomains and friends. We already have the
framework in the RPC generator for creating the filter, and
previous cleanup patches got us to the point that we can now
wire the filter through the entire object event stack.
Furthermore, whether or not domain:getattr is honored, use of
global events is a form of obtaining a list of networks, which
is covered by connect:search_domains added in a93cd08 (v1.1.0).
Ideally, we'd have a way to enforce connect:search_domains when
doing global registrations while omitting that check on a
per-domain registration. But this patch just unconditionally
requires connect:search_domains, even when no list could be
obtained, based on the following observations:
1. Administrators are unlikely to grant domain:getattr for one
or all domains while still denying connect:search_domains - a
user that is able to manage domains will want to be able to
manage them efficiently, but efficient management includes being
able to list the domains they can access. The idea of denying
connect:search_domains while still granting access to individual
domains is therefore not adding any real security, but just
serves as a layer of obscurity to annoy the end user.
2. In the current implementation, domain events are filtered
on the client; the server has no idea if a domain filter was
requested, and must therefore assume that all domain event
requests are global. Even if we fix the RPC protocol to
allow for server-side filtering for newer client/server combos,
making the connect:serach_domains ACL check conditional on
whether the domain argument was NULL won't benefit older clients.
Therefore, we choose to document that connect:search_domains
is a pre-requisite to any domain event management.
Network events need the same treatment, with the obvious
change of using connect:search_networks and network:getattr.
* src/access/viraccessperm.h
(VIR_ACCESS_PERM_CONNECT_SEARCH_DOMAINS)
(VIR_ACCESS_PERM_CONNECT_SEARCH_NETWORKS): Document additional
effect of the permission.
* src/conf/domain_event.h (virDomainEventStateRegister)
(virDomainEventStateRegisterID): Add new parameter.
* src/conf/network_event.h (virNetworkEventStateRegisterID):
Likewise.
* src/conf/object_event_private.h (virObjectEventStateRegisterID):
Likewise.
* src/conf/object_event.c (_virObjectEventCallback): Track a filter.
(virObjectEventDispatchMatchCallback): Use filter.
(virObjectEventCallbackListAddID): Register filter.
* src/conf/domain_event.c (virDomainEventFilter): New function.
(virDomainEventStateRegister, virDomainEventStateRegisterID):
Adjust callers.
* src/conf/network_event.c (virNetworkEventFilter): New function.
(virNetworkEventStateRegisterID): Adjust caller.
* src/remote/remote_protocol.x
(REMOTE_PROC_CONNECT_DOMAIN_EVENT_REGISTER)
(REMOTE_PROC_CONNECT_DOMAIN_EVENT_REGISTER_ANY)
(REMOTE_PROC_CONNECT_NETWORK_EVENT_REGISTER_ANY): Generate a
filter, and require connect:search_domains instead of weaker
connect:read.
* src/test/test_driver.c (testConnectDomainEventRegister)
(testConnectDomainEventRegisterAny)
(testConnectNetworkEventRegisterAny): Update callers.
* src/remote/remote_driver.c (remoteConnectDomainEventRegister)
(remoteConnectDomainEventRegisterAny): Likewise.
* src/xen/xen_driver.c (xenUnifiedConnectDomainEventRegister)
(xenUnifiedConnectDomainEventRegisterAny): Likewise.
* src/vbox/vbox_tmpl.c (vboxDomainGetXMLDesc): Likewise.
* src/libxl/libxl_driver.c (libxlConnectDomainEventRegister)
(libxlConnectDomainEventRegisterAny): Likewise.
* src/qemu/qemu_driver.c (qemuConnectDomainEventRegister)
(qemuConnectDomainEventRegisterAny): Likewise.
* src/uml/uml_driver.c (umlConnectDomainEventRegister)
(umlConnectDomainEventRegisterAny): Likewise.
* src/network/bridge_driver.c
(networkConnectNetworkEventRegisterAny): Likewise.
* src/lxc/lxc_driver.c (lxcConnectDomainEventRegister)
(lxcConnectDomainEventRegisterAny): Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
We haven't had a release with network events yet, so we are free
to fix the RPC so that it actually does what we want. Doing
client-side filtering of per-network events is inefficient if a
connection is only interested in events on a single network out
of hundreds available on the server. But to do server-side
per-network filtering, the server needs to know which network
to filter on - so we need to pass an optional network over on
registration. Furthermore, it is possible to have a client with
both a global and per-network filter; in the existing code, the
server sends only one event and the client replicates to both
callbacks. But with server-side filtering, the server will send
the event twice, so we need a way for the client to know which
callbackID is sending an event, to ensure that the client can
filter out events from a registration that does not match the
callbackID from the server. Likewise, the existing style of
deregistering by eventID alone is fine; but in the new style,
we have to remember which callbackID to delete.
This patch fixes the RPC wire definition to contain all the
needed pieces of information, and hooks into the server and
client side improvements of the previous patches, in order to
switch over to full server-side filtering of network events.
Also, since we fixed this in time, all released versions of
libvirtd that support network events also support per-network
filtering, so we can hard-code that assumption into
network_event.c.
Converting domain events to server-side filtering will require
the introduction of new RPC numbers, as well as a server
feature bit that the client can use to tell whether to use
old-style (server only supports global events) or new-style
(server supports filtered events), so that is deferred to a
later set of patches.
* src/conf/network_event.c (virNetworkEventStateRegisterClient):
Assume server-side filtering.
* src/remote/remote_protocol.x
(remote_connect_network_event_register_any_args): Add network
argument.
(remote_connect_network_event_register_any_ret): Return callbackID
instead of count.
(remote_connect_network_event_deregister_any_args): Pass
callbackID instead of eventID.
(remote_connect_network_event_deregister_any_ret): Drop unused
type.
(remote_network_event_lifecycle_msg): Add callbackID.
* daemon/remote.c
(remoteDispatchConnectNetworkEventDeregisterAny): Drop unused arg,
and deal with callbackID from client.
(remoteRelayNetworkEventLifecycle): Pass callbackID.
(remoteDispatchConnectNetworkEventRegisterAny): Likewise, and
recognize non-NULL network.
* src/remote/remote_driver.c
(remoteConnectNetworkEventRegisterAny): Pass network, and track
server side id.
(remoteConnectNetworkEventDeregisterAny): Deregister by callback id.
(remoteNetworkBuildEventLifecycle): Pass remote id to event queue.
* src/remote_protocol-structs: Regenerate.
Signed-off-by: Eric Blake <eblake@redhat.com>
In order to mirror a server with per-object filtering, the client
needs to track which server callbackID is servicing the client
callback. This patch introduces the notion of a serverID, as
well as the plumbing to use it for network events, although the
actual complexity of using per-object filtering in the remote
driver is deferred to a later patch.
* src/conf/object_event.h (virObjectEventStateEventID): Add parameter.
(virObjectEventStateQueueRemote, virObjectEventStateSetRemote):
New prototypes.
(virObjectEventStateRegisterID): Move...
* src/conf/object_event_private.h: ...here, and add parameter.
(_virObjectEvent): Add field.
* src/conf/network_event.h (virNetworkEventStateRegisterClient): New
prototype.
* src/conf/object_event.c (_virObjectEventCallback): Add field.
(virObjectEventStateSetRemote): New function.
(virObjectEventStateQueue): Make wrapper around...
(virObjectEventStateQueueRemote): New function.
(virObjectEventCallbackListCount): Tweak return count when remote
id matching is used.
(virObjectEventCallbackLookup, virObjectEventStateRegisterID):
Tweak registration when remote id matching will be used.
(virObjectEventNew): Default to no remote id.
(virObjectEventCallbackListAddID): Likewise, but set remote id
when one is available.
(virObjectEventCallbackListRemoveID)
(virObjectEventCallbackListMarkDeleteID): Adjust return value when
remote id was set.
(virObjectEventStateEventID): Query existing id.
(virObjectEventDispatchMatchCallback): Require matching event id.
(virObjectEventStateCallbackID): Adjust caller.
* src/conf/network_event.c (virNetworkEventStateRegisterClient): New
function.
(virNetworkEventStateRegisterID): Update caller.
* src/conf/domain_event.c (virDomainEventStateRegister)
(virDomainEventStateRegisterID): Update callers.
* src/remote/remote_driver.c
(remoteConnectNetworkEventRegisterAny)
(remoteConnectNetworkEventDeregisterAny)
(remoteConnectDomainEventDeregisterAny): Likewise.
(remoteEventQueue): Hoist earlier to avoid forward declaration,
and add parameter. Adjust all callers.
* src/libvirt_private.syms (conf/object_event.h): Drop function.
Signed-off-by: Eric Blake <eblake@redhat.com>
Ever since commit 61ac8ce, Coverity complained about
remoteNetworkBuildEventLifecycle not checking for NULL failure
to build an event, compared to other calls in the code base.
But the problem is latent from copy and paste; all 17 of our
remote*BuildEvent* functions in remote_driver.c have the same
issue - if an OOM causes an event to not be built, we happily
pass NULL to remoteEventQueue(), but that function has marked
event as a nonnull parameter. We were getting lucky (the
event queue's first use of the event happened to be a call to
virIsObjectClass(), which acts gracefully on NULL, so there
was no way to crash); but this is a latent bug waiting to bite
us due to the disregard for the nonnull attribute, as well as
a waste of resources in the event queue. Better is to just
refuse to queue NULL. The discard is silent, since the problem
only happens on OOM, and since events are already best effort -
if we fail to get an event, it's not like we have any memory
left to report the issue, nor any idea of who would benefit
from knowing we couldn't create or queue the event.
* src/remote/remote_driver.c (remoteEventQueue): Ignore NULL event.
Signed-off-by: Eric Blake <eblake@redhat.com>
Commit cfd62c1 was incomplete; I found more cases where error
messages were being overwritten, and where the code between
the three registration/deregistration APIs was not consistent.
Since it is fairly easy to trigger an attempt to deregister an
unregistered object through public API, I also changed the error
message from VIR_ERR_INTERNAL_ERROR to VIR_ERR_INVALID_ARG.
* src/conf/object_event.c (virObjectEventCallbackListEventID):
Inline...
(virObjectEventStateEventID): ...into lone caller, and report
error on failure.
(virObjectEventCallbackListAddID, virObjectEventStateCallbackID)
(virObjectEventCallbackListRemoveID)
(virObjectEventCallbackListMarkDeleteID): Tweak error category.
* src/remote/remote_driver.c (remoteConnectDomainEventRegister):
Don't leak registration on failure.
(remoteConnectDomainEventDeregisterAny)
(remoteConnectNetworkEventDeregisterAny): Don't overwrite error.
Signed-off-by: Eric Blake <eblake@redhat.com>
While comparing network and domain events, I noticed that the
test driver had to do a cast in one place and not the other.
For consistency, we should hide the necessary casting as low
as possible in the stack, with everything else using saner
types.
* src/conf/network_event.h (virNetworkEventStateRegisterID): Alter
type.
* src/conf/network_event.c (virNetworkEventStateRegisterID): Hoist
cast here.
* src/test/test_driver.c (testConnectNetworkEventRegisterAny):
Simplify callers.
* src/remote/remote_driver.c
(remoteConnectNetworkEventRegisterAny): Likewise.
* src/network/bridge_driver.c
(networkConnectNetworkEventRegisterAny): Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
Since the introduction of network events, any driver that uses
a single event state object to track both domain and network
events should not include 'domain' in the name of that object.
* src/test/test_driver.c (_testConn):
s/domainEventState/eventState/, and fix all callers.
* src/remote/remote_driver.c (private_data): Likewise.
(remoteDomainEventQueue): Rename to remoteEventQueue.
(remoteDomainEvents): Rename to remoteEvents.
Signed-off-by: Eric Blake <eblake@redhat.com>
Prior to this patch, an attempt to register an event without an
event loop started results in the vague:
libvirt: Remote Driver error : adding cb to list
Now it gives the much nicer:
libvirt: error : internal error: could not initialize domain event timer
This also avoids hiding other reasonable error messages, such as
attempts to register a duplicate callback or OOM errors.
* src/remote/remote_driver.c (remoteConnectNetworkEventRegisterAny)
(remoteConnectDomainEventRegister)
(remoteConnectDomainEventRegisterAny): Preserve more detailed error.
Signed-off-by: Eric Blake <eblake@redhat.com>
While the public API & wire protocol included the 'detail'
arg for network lifecycle events, the internal event handling
code did not process it. This meant that if a future libvirtd
server starts sending non-0 'detail' args, the current libvirt
client will not process them.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
With some authentication mechanism (PLAIN for example), sasl_client_start()
can return SASL_OK, which translates to virNetSASLSessionClientStart()
returning VIR_NET_SASL_COMPLETE.
cyrus-sasl documentation is a bit vague as to what to do in such situation,
but upstream clarified this a bit in
http://asg.andrew.cmu.edu/archive/message.php?mailbox=archive.cyrus-sasl&msg=10104
When we got VIR_NET_SASL_COMPLETE after virNetSASLSessionClientStart() and
if the remote also tells us that authentication is complete, then we should
end the authentication procedure rather than forcing a call to
virNetSASLSessionClientStep(). Without this patch, when trying to use SASL
PLAIN, I get:
error :authentication failed : Failed to step SASL negotiation: -1
(SASL(-1): generic failure: Unable to find a callback: 32775)
This patch is based on a spice-gtk patch by Dietmar Maurer.
The array of sasl_callback_t callbacks which is passed to sasl_client_new()
must be kept alive as long as the created sasl_conn_t object is alive as
cyrus-sasl uses this structure internally for things like logging, so
the memory used for callbacks must only be freed after sasl_dispose() has
been called.
During testing of successful SASL logins with
virsh -c qemu+tls:///system list --all
I've been getting invalid read reports from valgrind
==9237== Invalid read of size 8
==9237== at 0x6E93B6F: _sasl_getcallback (common.c:1745)
==9237== by 0x6E95430: _sasl_log (common.c:1850)
==9237== by 0x16593D87: digestmd5_client_mech_dispose (digestmd5.c:4580)
==9237== by 0x6E91653: client_dispose (client.c:332)
==9237== by 0x6E9476A: sasl_dispose (common.c:851)
==9237== by 0x4E225A1: virNetSASLSessionDispose (virnetsaslcontext.c:678)
==9237== by 0x4CBC551: virObjectUnref (virobject.c:262)
==9237== by 0x4E254D1: virNetSocketDispose (virnetsocket.c:1042)
==9237== by 0x4CBC551: virObjectUnref (virobject.c:262)
==9237== by 0x4E2701C: virNetSocketEventFree (virnetsocket.c:1794)
==9237== by 0x4C965D3: virEventPollCleanupHandles (vireventpoll.c:583)
==9237== by 0x4C96987: virEventPollRunOnce (vireventpoll.c:652)
==9237== by 0x4C94730: virEventRunDefaultImpl (virevent.c:274)
==9237== by 0x12C7BA: vshEventLoop (virsh.c:2407)
==9237== by 0x4CD3D04: virThreadHelper (virthreadpthread.c:161)
==9237== by 0x7DAEF32: start_thread (pthread_create.c:309)
==9237== by 0x8C86EAC: clone (clone.S:111)
==9237== Address 0xe2d61b0 is 0 bytes inside a block of size 168 free'd
==9237== at 0x4A07577: free (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==9237== by 0x4C73827: virFree (viralloc.c:580)
==9237== by 0x4DE4BC7: remoteAuthSASL (remote_driver.c:4219)
==9237== by 0x4DE33D0: remoteAuthenticate (remote_driver.c:3639)
==9237== by 0x4DDBFAA: doRemoteOpen (remote_driver.c:832)
==9237== by 0x4DDC8DC: remoteConnectOpen (remote_driver.c:1031)
==9237== by 0x4D8595F: do_open (libvirt.c:1239)
==9237== by 0x4D863F3: virConnectOpenAuth (libvirt.c:1481)
==9237== by 0x12762B: vshReconnect (virsh.c:337)
==9237== by 0x12C9B0: vshInit (virsh.c:2470)
==9237== by 0x12E9A5: main (virsh.c:3338)
This commit changes virNetSASLSessionNewClient() to take ownership of the SASL
callbacks. Then we can free them in virNetSASLSessionDispose() after the corresponding
sasl_conn_t has been freed.
When testing SASL authentication over TLS with
virsh -c qemu+tls:///system list --all
I got this valgrind trace after entering wrong credentials:
==30540== 26,903 (88 direct, 26,815 indirect) bytes in 1 blocks are definitely lost in loss record 289 of 293
==30540== at 0x4A081D4: calloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==30540== by 0x4C7379A: virAllocVar (viralloc.c:558)
==30540== by 0x4CBC178: virObjectNew (virobject.c:190)
==30540== by 0x4CBC329: virObjectLockableNew (virobject.c:216)
==30540== by 0x4E2D003: virNetTLSContextNew (virnettlscontext.c:719)
==30540== by 0x4E2DC3F: virNetTLSContextNewPath (virnettlscontext.c:930)
==30540== by 0x4E2DD5B: virNetTLSContextNewClientPath (virnettlscontext.c:957)
==30540== by 0x4DDB618: doRemoteOpen (remote_driver.c:627)
==30540== by 0x4DDC8BA: remoteConnectOpen (remote_driver.c:1031)
==30540== by 0x4D8595F: do_open (libvirt.c:1239)
==30540== by 0x4D863F3: virConnectOpenAuth (libvirt.c:1481)
==30540== by 0x12762B: vshReconnect (virsh.c:337)
==30540== by 0x12C9B0: vshInit (virsh.c:2470)
==30540== by 0x12E9A5: main (virsh.c:3338)
Most of our code base uses space after comma but not before;
fix the remaining uses before adding a syntax check.
* src/lxc/lxc_container.c: Consistently use commas.
* src/openvz/openvz_driver.c: Likewise.
* src/openvz/openvz_util.c: Likewise.
* src/remote/remote_driver.c: Likewise.
* src/test/test_driver.c: Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
Most of the usage of getuid()/getgid() is in cases where we are
considering what privileges we have. As such the code should be
using the effective IDs, not real IDs.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
We don't want setuid programs automatically spawning libvirtd,
so disable any use of autostart when setuid.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
We don't know enough about quality of external libraries used
for non-UNIX transports, nor do we want to spawn external
commands when setuid. Restrict to the bare minimum which is
UNIX transport for local usage. Users shouldn't need to be
running setuid if connecting to remote hypervisors in any
case.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Unconditional use of getenv is not secure in setuid env.
While not all libvirt code runs in a setuid env (since
much of it only exists inside libvirtd) this is not always
clear to developers. So make all the code paranoid, even
if it only ever runs inside libvirtd.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The virConnectDomainXMLToNative API should require 'connect:write'
not 'connect:read', since it will trigger execution of the QEMU
binaries listed in the XML.
Also make virConnectDomainXMLFromNative API require a full
read-write connection and 'connect:write' permission. Although the
current impl doesn't trigger execution of QEMU, we should not
rely on that impl detail from an API permissioning POV.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Introduced by 7b87a3
When I quit the process which only register VIR_DOMAIN_EVENT_ID_REBOOT,
I got error like:
"libvirt: XML-RPC error : internal error: domain event 0 not registered".
Then I add the following code, it fixed.
Signed-off-by: Zhou Yimin <zhouyimin@huawei.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1012818
Commit 6d7d0b1869 (in 1.1.2) added bounds
checking to virDomainGetJobStats. But even at that time the API was able
to return 20 parameters while the limit was set to 16.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The polkit access driver used the wrong permission names for checks
on storage pools, volumes and node devices. This led to them always
being denied access.
The 'dettach' permission was also mis-spelt and should have been
'detach'. While permission names are ABI sensitive, the fact that
the code used the wrong object name for checking node device
permissions, means that no one could have used the mis-spelt
'dettach' permission.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The return values for the virConnectListAllSecrets call were not
bounds checked. This is a robustness issue for clients if
something where to cause corruption of the RPC stream data.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The return values for the virConnectListAllNWFilters call were not
bounds checked. This is a robustness issue for clients if
something where to cause corruption of the RPC stream data.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The return values for the virConnectListAllNodeDevices call were not
bounds checked. This is a robustness issue for clients if
something where to cause corruption of the RPC stream data.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The return values for the virConnectListAllInterfaces call were not
bounds checked. This is a robustness issue for clients if
something where to cause corruption of the RPC stream data.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The return values for the virConnectListAllNetworks call were not
bounds checked. This is a robustness issue for clients if
something where to cause corruption of the RPC stream data.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The return values for the virStoragePoolListAllVolumes call were not
bounds checked. This is a robustness issue for clients if
something where to cause corruption of the RPC stream data.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The return values for the virConnectListAllStoragePools call were not
bounds checked. This is a robustness issue for clients if
something where to cause corruption of the RPC stream data.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The return values for the virConnectListAllDomains call were not
bounds checked. This is a robustness issue for clients if
something where to cause corruption of the RPC stream data.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The return values for the virDomain{SnapshotListAllChildren,ListAllSnapshots}
calls were not bounds checked. This is a robustness issue for clients if
something where to cause corruption of the RPC stream data.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The return values for the virDomainGetJobStats call were not
bounds checked. This is a robustness issue for clients if
something where to cause corruption of the RPC stream data.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The parameters for the virDomainMigrate*Params RPC calls were
not bounds checks, meaning a malicious client can cause libvirtd
to consume arbitrary memory
This issue was introduced in the 1.1.0 release of libvirt
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Valgrind defects memory error:
==16759== 1 errors in context 1 of 8:
==16759== Invalid free() / delete / delete[] / realloc()
==16759== at 0x4A074C4: free (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==16759== by 0x83CD329: xdr_string (in /usr/lib64/libc-2.17.so)
==16759== by 0x4D93E4D: xdr_remote_nonnull_string (remote_protocol.c:31)
==16759== by 0x4D94350: xdr_remote_nonnull_domain (remote_protocol.c:58)
==16759== by 0x4D976C8: xdr_remote_domain_create_with_flags_ret (remote_protocol.c:1762)
==16759== by 0x83CC734: xdr_free (in /usr/lib64/libc-2.17.so)
==16759== by 0x4D7F1E0: remoteDomainCreateWithFlags (remote_driver.c:2441)
==16759== by 0x4D4BF17: virDomainCreateWithFlags (libvirt.c:9499)
==16759== by 0x13127A: cmdStart (virsh-domain.c:3376)
==16759== by 0x12BF83: vshCommandRun (virsh.c:1751)
==16759== by 0x126FFB: main (virsh.c:3205)
==16759== Address 0xe1394a0 is not stack'd, malloc'd or (recently) free'd
==16759== 1 errors in context 2 of 8:
==16759== Conditional jump or move depends on uninitialised value(s)
==16759== at 0x4A07477: free (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==16759== by 0x83CD329: xdr_string (in /usr/lib64/libc-2.17.so)
==16759== by 0x4D93E4D: xdr_remote_nonnull_string (remote_protocol.c:31)
==16759== by 0x4D94350: xdr_remote_nonnull_domain (remote_protocol.c:58)
==16759== by 0x4D976C8: xdr_remote_domain_create_with_flags_ret (remote_protocol.c:1762)
==16759== by 0x83CC734: xdr_free (in /usr/lib64/libc-2.17.so)
==16759== by 0x4D7F1E0: remoteDomainCreateWithFlags (remote_driver.c:2441)
==16759== by 0x4D4BF17: virDomainCreateWithFlags (libvirt.c:9499)
==16759== by 0x13127A: cmdStart (virsh-domain.c:3376)
==16759== by 0x12BF83: vshCommandRun (virsh.c:1751)
==16759== by 0x126FFB: main (virsh.c:3205)
==16759== Uninitialised value was created by a stack allocation
==16759== at 0x4D7F120: remoteDomainCreateWithFlags (remote_driver.c:2423)
How to reproduce?
# virsh start <domain> --paused
RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=994855
Signed-off-by: Alex Jia <ajia@redhat.com>
In the following commit:
commit 03d813bbcd
Author: Marek Marczykowski <marmarek@invisiblethingslab.com>
Date: Thu May 23 02:01:30 2013 +0200
remote: fix dom->id after virDomainCreateWithFlags
The virDomainCreateWithFlags remote client helper was made to
invoke REMOTE_PROC_DOMAIN_LOOKUP_BY_UUID to refresh the 'id'
of the domain, following the pattern used in the previous
virDomainCreate method impl.
The remote protocol for virDomainCreateWithFlags though did
actually fix the design flaw in virDomainCreate, by directly
returning the new domain info. For some reason, this data was
never used. So we can just use that data now instead.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Since they make use of file descriptor passing, the remote protocol
methods for virDomainCreate{XML}WithFiles must be written by hand.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This patch enables the password authentication in the libssh2 connection
driver. There are a few benefits to this step:
1) Hosts with challenge response authentication will now be supported
with the libssh2 connection driver.
2) Credential for hosts can now be stored in the authentication
credential config file
Convert the type of loop iterators named 'i', 'j', k',
'ii', 'jj', 'kk', to be 'size_t' instead of 'int' or
'unsigned int', also santizing 'ii', 'jj', 'kk' to use
the normal 'i', 'j', 'k' naming
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Found while trying to cross-compile to mingw:
CC libvirt_driver_remote_la-remote_driver.lo
../../src/remote/remote_driver.c: In function 'doRemoteOpen':
../../src/remote/remote_driver.c:487:23: error: variable 'verify' set but not used [-Werror=unused-but-set-variable]
* src/remote/remote_driver.c (doRemoteOpen): Also ignore 'verify'.
Signed-off-by: Eric Blake <eblake@redhat.com>
Introduce annotations to all RPC messages to declare what
access control checks are required. There are two new
annotations defined:
@acl: <object>:<permission>
@acl: <object>:<permission>:<flagname>
Declare the access control requirements for the API. May be repeated
multiple times, if multiple rules are required.
<object> is one of 'connect', 'domain', 'network', 'storagepool',
'interface', 'nodedev', 'secret'.
<permission> is one of the permissions in access/viraccessperm.h
<flagname> indicates the rule only applies if the named flag
is set in the API call
@aclfilter: <object>:<permission>
Declare an access control filter that will be applied to a list
of objects being returned by an API. This allows the returned
list to be filtered to only show those the user has permissions
against
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Without the socket path explicitly specified, the remote driver tried to
connect to the "/system" instance socket even if "/session" was
specified in the uri. With this patch this configuration now produces an
error.
It is still possible to initiate a session connection with specifying
the path to the socket manually and also manually starting the session
daemon. This was also possible prior to this patch,
This is a minimal fix. We may decide to support remote session
connections using ssh but this will require changes to the remote driver
code so this fix shouldn't cause regressions in the case we decide to do
that.
The RPC limits for cpu maps didn't allow to use libvirt on ultra big
boxes. This patch increases size of the limits to support a maximum of
16384 cpus on the host with a maximum of 4096 cpus per guest.
The full cpu map of such a system takes 8 megabytes and the map for
vcpu pinning is 2 kilobytes long.
The same issue as (already fixed) in virDomainCreate -
REMOTE_PROC_DOMAIN_CREATE_WITH_FLAGS doesn't return new domain ID, only
-1 on error or 0 on success.
Besides this one fix it is more general problem - local domain object
ID can desynchronize with the real one, for example in case of another
client creates/destroys domain in the meantime. Perhaps virDomainGetID
should be called remotely (with all performance implications...)? Or
some event-based notification used?
Signed-off-by: Marek Marczykowski <marmarek@invisiblethingslab.com>
We have seen an issue on s390x platform where domain XMLs larger than 1MB
were used. The define command was finished successfully. The dumpxml command
was not successful (i.e. could not encode message payload).
Enlarged message related sizes (e.g. maximum string size, message size, etc.)
to handle larger system configurations used on s390x platform.
To improve handling of the RPC message size the allocation during encode process
is changed to a dynamic one (i.e. starting with 64kB initial size and increasing
that size in steps up to 16MB if the payload data is larger).
Signed-off-by: Daniel Hansel <daniel.hansel@linux.vnet.ibm.com>
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
The source code base needs to be adapted as well. Some files
include virutil.h just for the string related functions (here,
the include is substituted to match the new file), some include
virutil.h without any need (here, the include is removed), and
some require both.
This requires a custom function for remoteNodeDeviceDetachFlags,
because it is named *NodeDevice, but it goes through the hypervisor
driver rather than nodedevice driver, and so it uses privateData
instead of nodeDevicePrivateData. (It has to go through the hypervisor
driver, because that is the driver that knows about the backend drivers
that will perform the pci device assignment).
Ensure that all drivers implementing public APIs use a
naming convention for their implementation that matches
the public API name.
eg for the public API virDomainCreate make sure QEMU
uses qemuDomainCreate and not qemuDomainStart
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
It will simplify later work if the sub-drivers have dedicated
APIs / field names. ie virNetworkDriver should have
virDrvNetworkOpen and virDrvNetworkClose methods
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The driver.h struct for node devices used an inconsistent
naming scheme 'DeviceMonitor' instead of the more usual
'NodeDeviceDriver'. Fix this everywhere it has leaked
out to.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Ensure that the driver struct field names match the public
API names. For an API virXXXX we must have a driver struct
field xXXXX. ie strip the leading 'vir' and lowercase any
leading uppercase letters.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
A number of the remote procedure names did not match the
corresponding API names. For example, many lacked the
word 'CONNECT', others re-arranged the names. Update the
procedures so their names exactly match the API names.
Then remove the special case handling of these APIs in
the generator
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Currently the RPC protocol files can contain annotations after
the protocol enum eg
REMOTE_PROC_DOMAIN_SNAPSHOT_LIST_CHILDREN_NAMES = 247, /* autogen autogen priority:high */
This is not very extensible as the number of annotations grows.
Change it to use
/**
* @generate: both
* @priority: high
*/
REMOTE_PROC_DOMAIN_SNAPSHOT_LIST_CHILDREN_NAMES = 247,
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The last Viktor's effort to fix the race and memory corruption unfortunately
wasn't complete in the case the close callback was not registered in an
connection. At that time, the trail of event's that I'll describe later could
still happen and corrupt the memory or cause a crash of the client (including
the daemon in case of a p2p migration).
Consider the following prerequisities and trail of events:
Let's have a remote connection to a hypervisor that doesn't have a close
callback registered and the client is using the event loop. The crash happens in
cooperation of 2 threads. Thread E is the event loop and thread W is the worker
that does some stuff. R denotes the remote client.
1.) W - The client finishes everything and sheds the last reference on the client
2.) W - The virObject stuff invokes virConnectDispose that invokes doRemoteClose
3.) W - the remote close method invokes the REMOTE_PROC_CLOSE RPC method.
4.) W - The thread is preempted at this point.
5.) R - The remote side receives the close and closes the socket.
6.) E - poll() wakes up due to the closed socket and invokes the close callback
7.) E - The event loop is preempted right before remoteClientCloseFunc is called
8.) W - The worker now finishes, and frees the conn object.
9.) E - The remoteClientCloseFunc accesses the now-freed conn object in the
attempt to retrieve pointer for the real close callback.
10.) Kaboom, corrupted memory/segfault.
This patch tries to fix this by introducing a new object that survives the
freeing of the connection object. We can't increase the reference count on the
connection object itself or the connection would never be closed, as the
connection is closed only when the reference count reaches zero.
The new object - virConnectCloseCallbackData - is a lockable object that keeps
the pointers to the real user registered callback and ensures that the
connection callback is either not called if the connection was already freed or
that the connection isn't freed while this is being called.
remoteDeserializeTypedParameters can now be called with either
preallocated params array (size of which is announced by nparams) or it
can allocate params array according to the number of parameters received
from the server.
Like virNodeDeviceCreateXML, virNodeDeviceLookupSCSIHostByWWN
has to be treated specially when generating the RPC codes. Also
new rules are added in fixup_name to keep the name SCSIHostByWWN.
Upon successful return of virNetClientStreamEventAddCallback() the
allocated cbdata field will be freed by virNetClientStreamEventRemoveCallback()
as cbOpaque using the free function remoteStreamCallbackFree().
This patch adds a new API, virDomainOpenChannel, that uses streams to
connect to a virtio channel on a guest. This creates a secure
communication channel between a guest and a libvirt client.
This behaves the same as virDomainOpenConsole, except on channels
instead of console/serial/parallel devices.
https://bugzilla.redhat.com/show_bug.cgi?id=866524
Since the virConnect object is not locked wholely when doing
virConenctDispose, a thread can get the lock and thus might
cause the race.
Detected by valgrind:
==23687== Invalid read of size 4
==23687== at 0x38BAA091EC: pthread_mutex_lock (pthread_mutex_lock.c:61)
==23687== by 0x3FBA919E36: remoteClientCloseFunc (remote_driver.c:337)
==23687== by 0x3FBA936BF2: virNetClientCloseLocked (virnetclient.c:688)
==23687== by 0x3FBA9390D8: virNetClientIncomingEvent (virnetclient.c:1859)
==23687== by 0x3FBA851AAE: virEventPollRunOnce (event_poll.c:485)
==23687== by 0x3FBA850846: virEventRunDefaultImpl (event.c:247)
==23687== by 0x40CD61: vshEventLoop (virsh.c:2128)
==23687== by 0x3FBA8626F8: virThreadHelper (threads-pthread.c:161)
==23687== by 0x38BAA077F0: start_thread (pthread_create.c:301)
==23687== by 0x33F68E570C: clone (clone.S:115)
==23687== Address 0x4ca94e0 is 144 bytes inside a block of size 312 free'd
==23687== at 0x4A0595D: free (vg_replace_malloc.c:366)
==23687== by 0x3FBA8588B8: virFree (memory.c:309)
==23687== by 0x3FBA86AAFC: virObjectUnref (virobject.c:145)
==23687== by 0x3FBA8EA767: virConnectClose (libvirt.c:1458)
==23687== by 0x40C8B8: vshDeinit (virsh.c:2584)
==23687== by 0x41071E: main (virsh.c:3022)
The above race is caused by the eventLoop thread tries to handle
the net client event by calling the callback set by:
virNetClientSetCloseCallback(priv->client,
remoteClientCloseFunc,
conn, NULL);
I.E. remoteClientCloseFunc, which lock/unlock the virConnect object.
This patch is to fix the bug by setting the callback to NULL when
doRemoteClose.
Currently to deal with auto-shutdown libvirtd must periodically
poll all stateful drivers. Thus sucks because it requires
acquiring both the driver lock and locks on every single virtual
machine. Instead pass in a "inhibit" callback to virStateInitialize
which drivers can invoke whenever they want to inhibit shutdown
due to existance of active VMs.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The virStateInitialize method and several cgroups methods were
using an 'int privileged' parameter or similar for dual-state
values. These are better represented with the bool type.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
* src/remote/remote_protocol.x: message definition
* src/remote/remote_driver.c: Register driver function
* src/remote_protocol-structs: Test case
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This will simplify the refactoring of the ESX storage driver to support
a VMFS and an iSCSI backend.
One of the tasks the storage driver needs to do is to decide which backend
driver needs to be invoked for a given request. This approach extends
virStoragePool and virStorageVol to store extra parameters:
1. privateData: stores pointer to respective backend storage driver.
2. privateDataFreeFunc: stores cleanup function pointer.
virGetStoragePool and virGetStorageVol are modfied to accept these extra
parameters as user params. virStoragePoolDispose and virStorageVolDispose
checks for cleanup operation if available.
The private data pointer allows the ESX storage driver to store a pointer
to the used backend with each storage pool and volume. This avoids the need
to detect the correct backend in each storage driver function call.
The libvirt coding standard is to use 'function(...args...)'
instead of 'function (...args...)'. A non-trivial number of
places did not follow this rule and are fixed in this patch.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
It turns out that calling virNodeGetCPUMap(conn, NULL, NULL, 0)
is both useful, and with Viktor's patches, common enough to
optimize. Since this interface hasn't been released yet, we
can change the RPC call.
A bit more background on the optimization - learning the cpu count
is a single file read (/sys/devices/system/cpu/possible), but
learning the number of online cpus can possibly trigger a file
read per cpu, depending on the age of the kernel, and all wasted
if the caller passed NULL for both arguments.
* src/nodeinfo.c (nodeGetCPUMap): Avoid bitmap when not needed.
* src/remote/remote_protocol.x (remote_node_get_cpu_map_args):
Supply two separate flags for needed arguments.
* src/remote/remote_driver.c (remoteNodeGetCPUMap): Update
caller.
* daemon/remote.c (remoteDispatchNodeGetCPUMap): Likewise.
* src/remote_protocol-structs: Regenerate.
- Defined the wire protocol format for virNodeGetCPUMap and its
arguments
- Implemented remote method invocation (remoteNodeGetCPUMap)
- Implemented method dispatcher (remoteDispatchNodeGetCPUMap)
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This patch adds support for SUSPEND_DISK event; both lifecycle and
separated. The support is added for QEMU, machines are changed to
PMSUSPENDED, but as QEMU sends SHUTDOWN afterwards, the state changes
to shut-off. This and much more needs to be done in order for libvirt
to work with transient devices, wake-ups etc. This patch is not
aiming for that functionality.
When auto-probing hypervisor drivers, the conn->uri field will
initially be NULL. Care must be taken not to access members
when doing auth lookups in the config file
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
