We're in the hostdev module, so mgr is not an ambiguous name, and
in fact it's already used in some cases. Switch all the code over.
Take the chance to shorten declaration of
virHostdevIsPCINodeDeviceUsedData structures.
When we want to look up a device in a device list and we already
have the IDs from another source, we can simply use
virPCIDeviceListFindByIDs() instead of creating a temporary device
object.
If 'last_processed_hostdev_vf != -1' is false then, since the
loop counter 'i' starts at 0, 'i <= last_processed_hostdev_vf'
can't possibly be true and the loop body will never be executed.
However, since 'i' is unsigned and 'last_processed_hostdev_vf'
is signed, we can't just get rid of the check completely; what
we can do is move it outside of the loop to avoid checking its
value on every iteration and cluttering the actual loop
condition.
This serves the same purpose as VIR_ERR_NO_xxx where xxx is any object
that API can be called upon. Only this particular one is used for
daemon's servers.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
The comment claimed that virPCIDeviceReattach() does not reattach
a device to the host driver; except it actually does, so the
comment is just confusing and we're better off removing it.
Replace the term "loop" with the more generic "step". This allows us
to be more flexible and eg. have a step that consists in a single
function call.
Don't include the number of steps in the first comment of the
function, so that we can add or remove steps without having to worry
about keeping that comment in sync.
For the same reason, remove the summary contained in that comment.
Clean up some weird vertical spacing while we're at it.
While trying to build with -Os I've encountered some build
failures.
util/vircommand.c: In function 'virCommandAddEnvFormat':
util/vircommand.c:1257:1: error: inlining failed in call to 'virCommandAddEnv': call is unlikely and code size would grow [-Werror=inline]
virCommandAddEnv(virCommandPtr cmd, char *env)
^
util/vircommand.c:1308:5: error: called from here [-Werror=inline]
virCommandAddEnv(cmd, env);
^
This function is big enough for the compiler to be not inlined.
This is the error message I'm seeing:
Then virDomainNumatuneNodeSpecified is exported and called from
other places. It shouldn't be inlined then.
In file included from network/bridge_driver_platform.h:30:0,
from network/bridge_driver_platform.c:26:
network/bridge_driver_linux.c: In function 'networkRemoveRoutingFirewallRules':
./conf/network_conf.h:350:1: error: inlining failed in call to 'virNetworkDefForwardIf.constprop': call is unlikely and code size would grow [-Werror=inline]
virNetworkDefForwardIf(const virNetworkDef *def, size_t n)
^
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
More fallout from changing to using virPolkitAgent and handling error
paths. Needed to clear the 'cmd' once stored and of course add the
virCommandFree(cmd) in the error: label.
In virPolkitAgentCreate neglected to initialize agent to NULL. If
there was an error in the pipe, then we jump to error and would have
an issue. Found by coverity.
qemuProcessSetupEmulator runs at a point in time where there is only
the qemu main thread. Use virCgroupAddTask to put just that one task
into the emulator cgroup. That patch makes virCgroupMoveTask and
virCgroupAddTaskStrController obsolete.
Signed-off-by: Henning Schild <henning.schild@siemens.com>
Introduce virPolkitAgentCreate and virPolkitAgentDestroy
virPolkitAgentCreate will run the polkit pkttyagent image as an asynchronous
command in order to handle the local agent authentication via stdin/stdout.
The code makes use of the pkttyagent --notify-fd mechanism to let it know
when the agent is successfully registered.
virPolkitAgentDestroy will close the command effectively reaping our
child process
When there isn't a ssh -X type session running and a user has not
been added to the libvirt group, attempts to run 'virsh -c qemu:///system'
commands from an otherwise unprivileged user will fail with rather
generic or opaque error message:
"error: authentication failed: no agent is available to authenticate"
This patch will adjust the error code and message to help reflect the
situation that the problem is the requested mechanism is UNAVAILABLE and
a slightly more descriptive error. The result on a failure then becomes:
"error: authentication unavailable: no polkit agent available to
authenticate action 'org.libvirt.unix.manage'"
A bit more history on this - at one time a failure generated the
following type message when running the 'pkcheck' as a subprocess:
"error: authentication failed: polkit\56retains_authorization_after_challenge=1
Authorization requires authentication but no agent is available."
but, a patch was generated to adjust the error message to help provide
more details about what failed. This was pushed as commit id '96a108c99'.
That patch prepended a "polkit: " to the output. It really didn't solve
the problem, but gave a hint.
After some time it was deemed using DBus API calls directly was a
better way to go (since pkcheck calls them anyway). So, commit id
'1b854c76' (more or less) copied the code from remoteDispatchAuthPolkit
and adjusted it. Then commit id 'c7542573' adjusted the remote.c
code to call the new API (virPolkitCheckAuth). Finally, commit id
'308c0c5a' altered the code to call DBus APIs directly. In doing
so, it reverted the failing error message to the generic message
that would have been received from DBus anyway.
Use virCgroupAddTaskController in virCgroupAddTask so we have one
single point where we add tasks to cgroups.
Signed-off-by: Henning Schild <henning.schild@siemens.com>
The virHostdevIsVirtualFunction() was called exactly twice, and in
both cases the return value was saved to a temporary variable before
being checked. This would be okay if it improved readability, but in
this case is pretty pointless.
Get rid of the temporary variable and check the return value
directly; while at it, change the check from '<= 0' to '!= 1' to
align it with the way other similar *IsVirtualFunction() functions
are used thorough the code.
virNetDevIsVirtualFunction() returns 1 if the interface is a
virtual function, 0 if it isn't and -1 on error. This means that,
despite the name suggesting otherwise, using it as a predicate is
not correct.
Fix two callers that were doing so adding an explicit check on
the return value.
It may be useful in some cases to call TristateSwitch helper with TristateBool.
Document that enum values equivalency in the code.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
GIC v2 is the default, but checking against that specific version when
we want to know whether the default has been selected is potentially
error prone; using an alias instead makes it safer.
In cf113e8d we changed the declaration of
virCgroupAllowDevicePath() and virCgroupDenyDevicePath().
However, while updating the stub for non-cgroup platforms for the
former we forgot to update the latter too causing a build
failure.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The method will now return 0 on success and -1 on error, rather than number of
items which it iterated over before it returned back to the caller. Since the
only place where we actually check the number of elements iterated is in
virhashtest, return value of 0 and -1 can be a pretty accurate hint that it
iterated over all the items. However, if we really want to know the number of
items iterated over (like virhashtest does), a counter has to be provided
through opaque data to each iterator call. This patch adjusts return value of
virHashForEach, refactors the body, so it returns as soon as one of the
iterators fail and adjusts virhashtest to reflect these changes.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Our existing virHashForEach method iterates through all items disregarding the
fact, that some of the iterators might have actually failed. Errors are usually
dispatched through an error element in opaque data which then causes the
original caller of virHashForEach to return -1. In that case, virHashForEach
could return as soon as one of the iterators fail. This patch changes the
iterator return type and adjusts all of its instances accordingly, so the
actual refactor of virHashForEach method can be dealt with later.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
When adding disk images to ACL we may call those functions on NFS
shares. In that case we might get an EACCES, which isn't really relevant
since NFS would not hold a block device. This patch adds a flag that
allows to stop reporting an error on EACCES to avoid spaming logs.
Currently there's no functional change.
Since commit 47e5b5ae virCgroupAllowDevice allows to pass -1 as either
the minor or major device number and it automatically uses '*' in place
of that. Reuse the new approach through the code and drop the duplicated
functions.
We currently blindly accept any numeric value as a GIC version, even
though only GIC v2 and GIC v3 actually exist; on the other hand, we
reject "host", which is a perfectly legitimate value for QEMU guests.
This new enumeration contains all GIC versions libvirt is aware of.
The existing log messages for this have several problems; there are
two lines of log when one will suffice, they duplicate the function
name in log message (when it's already included by VIR_DEBUG), they're
missing some useful bits, they get logged even when the call is a NOP.
This patch cleans up the problems with those existing logs, and also
adds a new VIR_INFO-level log down at the function that is actually
creating and sending the netlink message that logs *everything* going
into the netlink message (which turns out to be much more useful in
practice for me; I didn't want to eliminate the logs at the existing
location though, in case they are useful in some scenario I'm
unfamiliar with; anyway those logs are remaining at debug level, so it
shouldn't be a bother to anyone).
Apparently we are not the only ones with dumb free functions
because dbus_message_unref() does not accept NULL either. But if
I were to vote, this one is even more evil. Instead of returning
an error just like we do it immediately dereference any pointer
passed and thus crash you app. Well done DBus!
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f878ebda700 (LWP 31264)]
0x00007f87be4016e5 in ?? () from /usr/lib64/libdbus-1.so.3
(gdb) bt
#0 0x00007f87be4016e5 in ?? () from /usr/lib64/libdbus-1.so.3
#1 0x00007f87be3f004e in dbus_message_unref () from /usr/lib64/libdbus-1.so.3
#2 0x00007f87bf6ecf95 in virSystemdGetMachineNameByPID (pid=9849) at util/virsystemd.c:228
#3 0x00007f879761bd4d in qemuConnectCgroup (driver=0x7f87600a32a0, vm=0x7f87600c7550) at qemu/qemu_cgroup.c:909
#4 0x00007f87976386b7 in qemuProcessReconnect (opaque=0x7f87600db840) at qemu/qemu_process.c:3386
#5 0x00007f87bf6edfff in virThreadHelper (data=0x7f87600d5580) at util/virthread.c:206
#6 0x00007f87bb602334 in start_thread (arg=0x7f878ebda700) at pthread_create.c:333
#7 0x00007f87bb3481bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
(gdb) frame 2
#2 0x00007f87bf6ecf95 in virSystemdGetMachineNameByPID (pid=9849) at util/virsystemd.c:228
228 dbus_message_unref(reply);
(gdb) p reply
$1 = (DBusMessage *) 0x0
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The virStringListLength function does not ever modify the passed
string list. It merely counts the items in it. Make sure that we
reflect this bit in the function header.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
(crobinso: fix up spacing and squash in sheepdog bit suggested
by Andrea)
In the commit 7938b533 we've changed the function signature,
however forgot to update stump that's used on systems without
CGroups causing a build failure.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
I've noticed that variable @reply is not initialized and if
something at the beginning of the function fails, e.g.
virDBusGetSystemBus(), the control jump straight to cleanup label
where dbus_message_unref() is then called over this uninitialized
variable.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
I've noticed couple of warning in dmesg while debugging
something:
[ 9683.973754] HTB: quantum of class 10001 is big. Consider r2q change.
[ 9683.976460] HTB: quantum of class 10002 is big. Consider r2q change.
I've read the HTB documentation and linux kernel code to find out
what's wrong. Basically we need to pass another argument
"quantum" to our tc cmd line because the default computed by HTB
does not always work in which case the warning message is printed
out.
You can read more details here:
http://luxik.cdi.cz/~devik/qos/htb/manual/userg.htm#sharing
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
So, systemd-machined has this philosophy that machine names are like
hostnames and hence should follow the same rules. But we always allowed
international characters in domain names. Thus we need to modify the
machine name we are passing to systemd.
In order to change some machine names that we will be passing to systemd,
we also need to call TerminateMachine at the end of a lifetime of a
domain. Even for domains that were started with older libvirt. That
can be achieved thanks to virSystemdGetMachineNameByPID(). And because
we can change machine names, we can get rid of the inconsistent and
pointless escaping of domain names when creating machine names.
So this patch modifies the naming in the following way. It creates the
name as <drivername>-<id>-<name> where invalid hostname characters are
stripped out of the name and if the resulting name is longer, it
truncates it to 64 characters. That way we can start domains we
couldn't start before. Well, at least on systemd.
To make it work all together, the machineName (which is needed only with
systemd) is saved in domain's private data. That way the generation is
moved to the driver and we don't need to pass various unnecessary
arguments to cgroup functions.
The only thing this complicates a bit is the scope generation when
validating a cgroup where we must check both old and new naming, so a
slight modification was needed there.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1282846
Signed-off-by: Martin Kletzander <mkletzan@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.
Both admin and remote protocols define their own types
(remote_typed_param vs admin_typed_param). Because of the naming convention,
admin typed params wouldn't be able to reuse the serialization/deserialization
methods, which are tailored for use by remote protocol, even if those method
were exported properly. In that case, introduce a new internal data type
structurally copying both admin and remote protocols which, eventually, would
allow serializer and deserializer to be used in a more generic way.
Use 'ret' for return variable name, clarify use of 'param_idx' and avoid
unnecessary 'success' label. No functional changes. Also document the
function.
The affected functions are:
virPCIDeviceGetManaged()
virPCIDeviceGetUnbindFromStub()
virPCIDeviceGetRemoveSlot()
virPCIDeviceGetReprobe()
Change their return type from unsigned int to bool: the corresponding
members in struct _virPCIDevice are defined as bool, and even the
corresponding virPCIDeviceSet*() functions take a bool value as input
so there's no point in these functions having unsigned int as return
type.
Suggested-by: John Ferlan <jferlan@redhat.com>
Unbinding a PCI device from the stub driver can require several steps,
and it can be useful for debugging to be able to trace which of these
steps are performed and which are skipped for each device.
The name is confusing, and there are just two uses: one is a test case,
and the other will be removed as part of an upcoming refactoring of
the hostdev code.
Commit 871e10f fixed a memory corruption error, but called strlen()
twice on the same string to do so. Even though the compiler is
probably smart enough to optimize the second call away, having a
single invocation makes the code slightly cleaner.
Suggested-by: Michal Privoznik <mprivozn@redhat.com>
In 370608b4c7 we have introduced two new internal APIs.
However, there are no stubs for build without macvtap. Therefore
build on systems lacking macvtap support (e.g. mingw or freebds)
fails when trying to link.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
libvirtd crashes on free()ing portData for an open vswitch port if that port
was deleted. To reproduce:
ovs-vsctl del-port vnet0
virsh migrate --live kvm1 qemu+ssh://dstHost/system
Error message:
libvirtd: *** Error in `/usr/sbin/libvirtd': free(): invalid pointer: 0x000003ff90001e20 ***
The problem is that virCommandRun can return an empty string in the event that
the port being queried does not exist. When this happens then we are
unconditionally overwriting a newline character at position strlen()-1. When
strlen is 0, we overwrite memory that does not belong to the string.
The fix: Only overwrite the newline if the string is not empty.
Reviewed-by: Bjoern Walk <bwalk@linux.vnet.ibm.com>
Signed-off-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
This patch creates two bitmaps, one for macvlan device names and one
for macvtap. The bitmap position is used to indicate that libvirt is
currently using a device with the name macvtap%d/macvlan%d, where %d
is the position in the bitmap. When requested to create a new
macvtap/macvlan device, libvirt will now look for the first clear bit
in the appropriate bitmap and derive the device name from that rather
than just starting at 0 and counting up until one works.
When libvirtd is restarted, the qemu driver code that reattaches to
active domains calls the appropriate function to "re-reserve" the
device names as it is scanning the status of running domains.
Note that it may seem strange that the retry counter now starts at
8191 instead of 5. This is because we now don't do a "pre-check" for
the existence of a device once we've reserved it in the bitmap - we
move straight to creating it; although very unlikely, it's possible
that someone has a running system where they have a large number of
network devices *created outside libvirt* named "macvtap%d" or
"macvlan%d" - such a setup would still allow creating more devices
with the old code, while a low retry max in the new code would cause a
failure. Since the objective of the retry max is just to prevent an
infinite loop, and it's highly unlikely to do more than 1 iteration
anyway, having a high max is a reasonable concession in order to
prevent lots of new failures.
In the following cases nl_recv() was returning the error "No buffer
space available":
* When switching CPUs to offline/online in a system more than 128 cpus
* When using virsh to destroy domain in a system with many interfaces
This patch sets the buffer size for all netlink sockets created by
libnl to 128K and turns on message peeking for nl_recv(). This
eliminates the "No buffer space available" errors seen in the cases
above, and also preempts other future errors the smaller buffers could
have caused.
Signed-off-by: Leno Hou <houqy@linux.vnet.ibm.com>
Signed-off-by: Laine Stump <laine@laine.org>
In dc576025c3 we renamed virCgroupIsolateMount function to
virCgroupBindMount. However, we forgot about one occurrence in
section of the code which provides stubs for platforms without
support for CGroups like *BSD for instance.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
On the host when we start a container, it will be
placed in a cgroup path of
/machine.slice/machine-lxc\x2ddemo.scope
under /sys/fs/cgroup/*
Inside the containers' namespace we need to setup
/sys/fs/cgroup mounts, and currently will bind
mount /machine.slice/machine-lxc\x2ddemo.scope on
the host to appear as / in the container.
While this may sound nice, it confuses applications
dealing with cgroups, because /proc/$PID/cgroup
now does not match the directory in /sys/fs/cgroup
This particularly causes problems for systems and
will make it create repeated path components in
the cgroup for apps run in the container eg
/machine.slice/machine-lxc\x2ddemo.scope/machine.slice/machine-lxc\x2ddemo.scope/user.slice/user-0.slice/session-61.scope
This also causes any systemd service that uses
sd-notify to fail to start, because when systemd
receives the notification it won't be able to
identify the corresponding unit it came from.
In particular this break rabbitmq-server startup
Future kernels will provide proper cgroup namespacing
which will handle this problem, but until that time
we should not try to play games with hiding parent
cgroups.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
libvirt always resets the MAC address of the physdev used for macvtap
passthrough when the guest is finished with it. This was happening
prior to the 802.1Qb[gh] DISASSOCIATE command, and was quite often
failing, presumably because the driver wouldn't allow the MAC address
to be reset while the association was still active, with a log message
like this:
virNetDevSetMAC:168 : Cannot set interface MAC to 00:00:00:00:00:00 on 'eth13': Cannot assign requested address
This patch changes the order - we now do the 802.1Qb[gh] disassociate
and delete the macvtap interface first, then and reset the MAC
address.
if instanceId is NULL
When virNetDevVPortProfileGetStatus() was called with instanceId =
NULL (which is the case for all DISASSOCIATE requests in 802.1Qbh) it
would log the following error:
Could not find netlink response with expected parameters
even though the disassociate had been successfully completely. Then,
due to the fortunate coincidence of status having been initialized to
0 and then not changed when the "failure" was encountered, it would
still return a status of 0 (PORT_VDP_RESPONSE_SUCCESS), so the caller
would assume a successful operation.
This would result in a spurious log message though, and would fill in
LastErrorMessage, so that the API would return that error if it
happened during cleanup from some other error. That, in turn, would
lead to an incorrect supposition that the response to the port profile
disassociate was the cause of the failure.
During debugging, I noticed that the VF in question usually had *no
uuid* associated with it (big surprise)by the time the disassociate
completed, so the solution is *not* to send the previous instanceId
down.
This patch fixes virNetDevVPortProfileGetStatus() to only check the
VF's uuid in the status if it was given an instanceId to check against
when originally called. Otherwise it only checks that the particular
VF is present (it will be).
This does cause a slight difference in behavior - rather than
returning with status unchanged (and thus always 0) it will actually
get the IFLA_PORT_RESPONSE. This could lead to revelation of error
conditions we were previously ignoring. Or not. So far "not".
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>
As cgroup implementation only works on Linux, it does not
make much sense to include sys/mount.h if other requirements are
not met, such as HAVE_MNTENT_H and HAVE_GETMNTENT_R.
Also, it fixes build on OpenBSD that requires to include sys/param.h
along with sys/mount.h.
Signed-off-by: Roman Bogorodskiy <bogorodskiy@gmail.com>
Most of the changes to the list of active and inactive PCI devices
happen in virHostdev, where they are properly logged.
virPCIDeviceDetach() and virPCIDeviceReattach(), however, change the
inactive list as well, so they should be logging similar messages.
Instead of misusing a const string to hold up runtime allocated
data, introduce new variable @hoststr and obey const correctness.
==6879== 15 bytes in 1 blocks are definitely lost in loss record 68 of 1,064
==6879== at 0x4C29F80: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==6879== by 0xA7DDF97: vasprintf (in /lib64/libc-2.21.so)
==6879== by 0x552BBC6: virVasprintfInternal (virstring.c:493)
==6879== by 0x552BCDB: virAsprintfInternal (virstring.c:514)
==6879== by 0x54FA44C: virLogHostnameString (virlog.c:468)
==6879== by 0x54FAB0F: virLogVMessage (virlog.c:645)
==6879== by 0x54FA680: virLogMessage (virlog.c:531)
==6879== by 0x54FBBF4: virLogParseOutputs (virlog.c:1130)
==6879== by 0x11CB4F: daemonSetupLogging (libvirtd.c:685)
==6879== by 0x11E137: main (libvirtd.c:1297)
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Once @hostname is printed into @hoststr we don't need it anymore.
==6879== 5 bytes in 1 blocks are definitely lost in loss record 10 of 1,064
==6879== at 0x4C29F80: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==6879== by 0xA7ED599: strdup (in /lib64/libc-2.21.so)
==6879== by 0x552C126: virStrdup (virstring.c:726)
==6879== by 0x553B13E: virGetHostnameImpl (virutil.c:720)
==6879== by 0x553B1BF: virGetHostnameQuiet (virutil.c:741)
==6879== by 0x54FA3FD: virLogHostnameString (virlog.c:462)
==6879== by 0x54FAB0F: virLogVMessage (virlog.c:645)
==6879== by 0x54FA680: virLogMessage (virlog.c:531)
==6879== by 0x54FBBF4: virLogParseOutputs (virlog.c:1130)
==6879== by 0x11CB4F: daemonSetupLogging (libvirtd.c:685)
==6879== by 0x11E137: main (libvirtd.c:1297)
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
If no port number was provided for a storage pool libvirt defaults to
port 6789; however, librbd/librados already default to 6789 when no port
number is provided.
In the future Ceph will switch to a new port for the Ceph monitors since
port 6789 is already assigned to a different application by IANA.
Port 6789 is assigned to SMC-HTTPS and Ceph now has port 3300 assigned as
the 'Ceph monitor' port.
In this case it is the best solution to not hardcode any port number into
libvirt and let librados handle the connection.
Only if a user specifies a different port number we pass it down to librados,
otherwise we leave it blank.
Signed-off-by: Wido den Hollander <wido@widodh.nl>
merge
Due to debug logs like this:
virPCIGetDeviceAddressFromSysfsLink:2432 : Attempting to resolve device path from device link '/sys/class/net/eth1/device/virtfn6'
logStrToLong_ui:2369 : Converted '0000:07:00.7' to unsigned int 0
logStrToLong_ui:2369 : Converted '07:00.7' to unsigned int 7
logStrToLong_ui:2369 : Converted '00.7' to unsigned int 0
logStrToLong_ui:2369 : Converted '7' to unsigned int 7
virPCIGetDeviceAddressFromSysfs:1947 : virPCIDeviceAddress 0000:07:00.7
virPCIGetVirtualFunctions:2554 : Found virtual function 7
printed *once for each SR-IOV Virtual Function* of a Physical Function
each time libvirt retrieved the list of VFs (so if the system has 128
VFs, there would be 900 lines of log for each call), the debug logs on
any system with a large number of VFs was dominated by "information"
that was possibly useful for debugging when the code was being
written, but is now useless for debugging of any problem on a running
system, and only serves to obscure the real useful information. This
overkill has no place in production code, so this patch removes it.
The previous error message just indicated that the desired response
couldn't be found, this patch tells what was desired, as well as
listing out the entire table that had been in the netlink response, to
give some kind of idea why it failed.
I noticed in a log file that we had failed to set a MAC address. The
log said which interface we were trying to set, but didn't give the
offending MAC address, which could have been useful in determining the
source of the problem. This patch modifies all three places in the
code that set MAC addresses to report the failed MAC as well as
interface.
The manpage for sysconf() suggest including unistd.h as the
function is declared there. Even though we are not hitting any
compile issues currently, let's include the correct header file
instead of relying on some hidden include chain.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
We want to eventually factor out the code dealing with device detaching
and reattaching, so that we can share it and make sure it's called eg.
when 'virsh nodedev-detach' is used.
For that to happen, it's important that the lists of active and inactive
PCI devices are updated every time a device changes its state.
Instead of passing NULL as the last argument of virPCIDeviceDetach() and
virPCIDeviceReattach(), pass the proper list so that it can be updated.
This replaces the virPCIKnownStubs string array that was used
internally for stub driver validation.
Advantages:
* possible values are well-defined
* typos in driver names will be detected at compile time
* avoids having several copies of the same string around
* no error checking required when setting / getting value
The names used mirror those in the
virDomainHostdevSubsysPCIBackendType enumeration.
This internal function supports, in theory, binding to a different
stub driver than the one the PCI device has been configured to use.
In practice, it is only ever called like
virPCIDeviceBindToStub(dev, dev->stubDriver);
which makes its second parameter redundant. Get rid of it, along
with the extra string copy required to support it.
This function can be used to retrieve the current locked memory
limit for a process, so that the setting can be later restored.
Add a configure check for getrlimit(), which we now use.
The prlimit() function allows both getting and setting limits for
a process; expose the same functionality in our wrapper.
Add the const modifier for new_limit, in accordance with the
prototype for prlimit().
Instead of replicating the information (domain, bus, slot, function)
inside the virPCIDevice structure, use the already-existing
virPCIDeviceAddress structure.
For users of the module, this means that the object returned by
virPCIDeviceGetAddress() can no longer be NULL and must no longer
be freed by the caller.
virCgroupNewMachine used to add the pidleader to the newly created
machine cgroup. Do not do this implicit anymore.
Signed-off-by: Henning Schild <henning.schild@siemens.com>
Firstly, there's a bug (or typo) in the only place where we call
this function: @multiqueue is set whenever @tapfdSize is greater
than zero, while in fact the condition should have been 'greater
than one'.
Then, secondly, since the condition depends on just one
variable, that we are even passing down to the function, we can
move the condition into the function and drop useless argument.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Some older systems, e.g. RHEL-6 do not have IFF_MULTI_QUEUE flag
which we use to enable multiqueue feature. Therefore one gets the
following compile error there:
CC util/libvirt_util_la-virnetdevmacvlan.lo
util/virnetdevmacvlan.c: In function 'virNetDevMacVLanTapSetup':
util/virnetdevmacvlan.c:338: error: 'IFF_MULTI_QUEUE' undeclared (first use in this function)
util/virnetdevmacvlan.c:338: error: (Each undeclared identifier is reported only once
util/virnetdevmacvlan.c:338: error: for each function it appears in.)
make[3]: *** [util/libvirt_util_la-virnetdevmacvlan.lo] Error 1
So, whenever user wants us to enable the feature on such systems,
we will just throw a runtime error instead.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Commit id '56e2171c6' removed a variable from the argument list, but
neglected to update the ATTRIBUTE_NONNULL values, so when commit id
'08da97bfb' added a couple of arguments, the values were off.
Always return LLONG_MAX even on 32 bit systems. The limitation
originates from our use of "unsigned long" in several APIs. The internal
data type is unsigned long long. Make the test suite deterministic by
removing the architecture difference.
Flaw was introduced in 645881139b where
I've added a test that uses too large numbers.
For the multiqueue on macvtaps we are going to need to open
the device multiple times. Currently, this is not supported.
Rework the function, so that upper layers can be reworked too.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Like we are doing for TUN/TAP devices, we should do the same for
macvtaps. Although, it's not as critical as in that case, we
should do it for the consistency.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
For the multiqueue on macvtaps we are going to need to open
the device multiple times. Currently, this is not supported.
Rework the function, so that upper layers can be reworked too.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
For the multiqueue on macvtaps we are going to need to open
the device multiple times. Currently, this is not supported.
Rework the function, so that upper layers can be reworked too.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
There are few outdated things. Firstly, we don't need to undergo
the torture of fopen, fscanf and fclose just to get the interface
index when we have nice wrapper over that: virNetDevGetIndex.
Secondly, we don't need to have statically allocated buffer for
the path we are opening.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
So yet again one of integer arguments that we use as a boolean.
Since the argument count of the function is unbearably long
enough, lets turn those booleans into flags.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
On the very first log message we send to any output, we include
the libvirt version number and package string. In some bug reports
we have been given libvirtd.log files that came from a different
host than the corresponding /var/log/libvirt/qemu log files. So
extend the initial log message to include the hostname too.
eg on first log message we would now see:
$ libvirtd
2015-12-04 17:35:36.610+0000: 20917: info : libvirt version: 1.3.0
2015-12-04 17:35:36.610+0000: 20917: info : hostname: dhcp-1-180.lcy.redhat.com
2015-12-04 17:35:36.610+0000: 20917: error : qemuMonitorIO:687 : internal error: End of file from monitor
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The log file descriptor associated with the virRotatingFile
struct should be marked close-on-exec, as even when virtlogd
re-exec's itself it expect to open the log file fresh. It
does not need to preserve the logfile handles, only the network
client FDs.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Commit 0f7436ca54 "network: wait for DAD to finish for bridge IPv6 addresses"
results in:
CC util/libvirt_util_la-virnetdevmacvlan.lo
util/virnetdev.c: In function 'virNetDevParseDadStatus':
util/virnetdev.c:1319:188: error: cast increases required alignment of target type [-Werror=cast-align]
util/virnetdev.c:1332:41: error: cast increases required alignment of target type [-Werror=cast-align]
util/virnetdev.c:1334:92: error: cast increases required alignment of target type [-Werror=cast-align]
cc1: all warnings being treated as errors
on at least ARM platforms.
The three macros involved (NLMSG_NEXT, IFA_RTA and RTA_NEXT) all appear to
correctly take care of alignment, therefore suppress Wcast-align around their
uses.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Maxim Perevedentsev <mperevedentsev@virtuozzo.com>
Cc: Laine Stump <laine@laine.org>
Cc: Dario Faggioli <dario.faggioli@citrix.com>
Cc: Jim Fehlig <jfehlig@suse.com>
Our domain_conf.* files are big enough. Not only they contain XML
parsing code, but they served as a storage of all functions whose
name is virDomain prefixed. This is just wrong as it gathers not
related functions (and modules) into one big file which is then
harder to maintain. Split virDomainObjList module into a separate
file called virdomainobjlist.[ch].
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
If for some reason there is an existing log file, that is larger then
max length of log file, we need to rollover that file immediately.
Trying to figure out how much data we could write will resolve in
overflow of unsigned variable 'towrite' and this leads to segfault.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
As we need to provide support for URI aliases in libvirt-admin as well, URI
alias matching needs to be internally visible. Since
virConnectOpenResolveURIAlias does have a compatible signature, it could be
easily reused by libvirt-admin. This patch moves URI alias matching to util,
renaming it accordingly.
virConnectGetConfig and virConnectGetConfigPath were static libvirt
methods, merely because there hasn't been any need for having them
internally exported yet. Since libvirt-admin also needs to reference
its config file, 'xGetConfig' should be exported.
Besides moving, this patch also renames the methods accordingly,
as they are libvirt config specific.
Machine name escaping follows the same rules as serice name escape,
except that '.' and '-' must not be escaped in machine names, due
to a bug in systemd-machined.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1282846
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Copy the virtlockd codebase across to form the initial virlogd
code. Simple search & replace of s/lock/log/ and gut the remote
protocol & dispatcher. This gives us a daemon that starts up
and listens for connections, but does nothing with them.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Add virRotatingFileReader and virRotatingFileWriter objects
which allow reading & writing from/to files with automation
rotation to N backup files when a size limit is reached. This
is useful for guest logging when a guaranteed finite size
limit is required. Use of external tools like logrotate is
inadequate since it leaves the possibility for guest to DOS
the host in between invokations of logrotate.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
According to the documentation, CreateMachine accepts only 7bit ASCII
characters in the machinename parameter, so let's make sure we can start
machines with unicode names with systemd. We already have a function
for that, we just forgot to use it.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1062943
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1282846
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
A PCI device may have the capability to setup virtual functions (VFs)
but have them currently all disabled. Prior to this patch, if that was
the case the the node device XML for the device wouldn't report any
virtual_functions capability.
With this patch, if a file called "sriov_totalvfs" is found in the
device's sysfs directory, its contents will be interpreted as a
decimal number, and that value will be reported as "maxCount" in a
capability element of the device's XML, e.g.:
<capability type='virtual_functions' maxCount='7'/>
This will be reported regardless of whether or not any VFs are
currently enabled for the device.
NB: sriov_numvfs (the number of VFs currently active) is also
available in sysfs, but that value is implied by the number of items
in the list that is inside the capability element, so there is no
reason to explicitly provide it as an attribute.
sriov_totalvfs and sriov_numvfs are available in kernels at least as far
back as the 2.6.32 that is in RHEL6.7, but in the case that they
simply aren't there, libvirt will behave as it did prior to this patch
- no maxCount will be displayed, and the virtual_functions capability
will be absent from the device's XML when 0 VFs are enabled.
Introduce a new helper function "virDiskNameParse" which extends
virDiskNameToIndex but handling both disk index and partition index.
Also rework virDiskNameToIndex to be based on virDiskNameParse.
A test is also added for this function testing both valid and
invalid disk names.
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
The LXC driver uses virSetUIDGID() to become UID/GID 0.
It passes an empty groups list to virSetUIDGID()
to get rid of all supplementary groups from the host side.
But virSetUIDGID() calls setgroups() only if the supplied list
is larger than 0.
This leads to a container root with unrelated supplementary groups.
In most cases this issue is unoticed as libvirtd runs as UID/GID 0
without any supplementary groups.
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This patch addresses BZ 1244895.
Adapt the sysfs TPM command cancel path for the TPM driver that
does not use a miscdevice anymore since Linux 4.0. Support old
and new paths and check their availability.
Add a mockup for the test cases to avoid the testing for
availability of the cancel path.
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Use virNetDevSetupControl instead of open coding using socket(AF_LOCAL...)
and clearing virIfreq.
By using virNetDevSetupControl, the socket is then opened using
AF_PACKET which requires being privileged (effectively root) in
order to complete successfully. Since that's now a requirement,
then the ioctl(SIOCETHTOOL) should not fail with EPERM, thus it
is removed from the filtered listed of failure codes.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Since the SIOCETHTOOL ioctl only works for privileged daemons, if called
when not root, then virNetDevGetFeatures will VIR_DEBUG a message and
return 0 as if the functions were not available for the architecture.
This effectively returns an empty bitmap indicating no features available.
Introduced by commit id 'c9027d8f4'
Signed-off-by: John Ferlan <jferlan@redhat.com>
In commit id 'c9027d8f4' when updating the posted patch to generate
a bitmap instead of an array of named feature bits, adjustment of
the args was missed
Recently reverted commit id '6f2a0198' showed a need to add extra
comments when dealing with filtering of potential "non-issues".
Scanning through upstream patch postings indicates early on the
reasons for the filtering of specific ioctl failures were provided;
however, when converted from causing an error to VIR_DEBUG's the
reasons were missing. A future read/change of the code incorrectly
assumed they could or should be removed.
This reverts commit 6f2a0198e9.
This commit removed error reporting from virNetDevSendEthtoolIoctl
pushing responsibility onto the callers. This is wrong, however,
since virNetDevSendEthtoolIoctl calls virNetDevSetupControl
which can still report errors. So as a result virNetDevSendEthtoolIoctl
may or may not report errors depending on which bit of it fails, and as
a result callers now overwrite some errors.
It also introduced a regression causing unprivileged libvirtd to
spew error messages to the console due to inability to query the
NIC features, an error which was previously ignored.
virNetDevSetupControlFull:148 : Cannot open network interface control socket: Operation not permitted
virNetDevFeatureAvailable:3062 : Cannot get device wlp3s0 flags: Operation not permitted
virNetDevSetupControlFull:148 : Cannot open network interface control socket: Operation not permitted
virNetDevFeatureAvailable:3062 : Cannot get device wlp3s0 flags: Operation not permitted
virNetDevSetupControlFull:148 : Cannot open network interface control socket: Operation not permitted
virNetDevFeatureAvailable:3062 : Cannot get device wlp3s0 flags: Operation not permitted
virNetDevSetupControlFull:148 : Cannot open network interface control socket: Operation not permitted
virNetDevFeatureAvailable:3062 : Cannot get device wlp3s0 flags: Operation not permitted
Looking back at the original posting I see no explanation of why
thsi refactoring was needed, so reverting the clearly broken
error reporting logic looks like the best option.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Commit id '0f7436ca' added virNetDevWaitDadFinish using ATTRIBUTE_NONNULL
for both arguments, although one is a non-null argument. A Coverity build
balks at that.
Rather than "if (virNetDevFeatureAvailable(ifname, &cmd))" change the
success criteria to "if (virNetDevFeatureAvailable(ifname, &cmd) == 1)".
The called helper returns -1 on failure, 0 on not found, and 1 on found.
Thus a failure was setting bits.
Introduced by commit ac3ed20 which changed the helper's return
values without adjusting its callers
Signed-off-by: John Ferlan <jferlan@redhat.com>
VIR_DEBUG and VIR_WARN will automatically add a new line to the message,
having "\n" at the end or at the beginning of the message results in
empty lines.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
This was originally set to 5 seconds, but times of 5.5 to 7 seconds
were experienced. Since it's an arbitrary number intended to prevent
an infinite hang, having it a bit too high won't hurt anything, and 20
seconds looks to be adequate (i.e. I think/hope we don't need to make
it tunable in libvirtd.conf)
If DAD not finished in 5 seconds, user will get an
unknown error like this:
# virsh net-start ipv6
error: Failed to start network ipv6
error: An error occurred, but the cause is unknown
Call virReportError to set an error.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Build on non-Linux fails because the virNetDevWaitDadFinish() stub
has unused parameters. Fix by adding appropriate ATTRIBUTE_UNUSED
for these parameters.
Pushing under build-breaker rule.
commit db488c79 assumed that dnsmasq would complete IPv6 DAD before
daemonizing, but in reality it doesn't wait, which creates problems
when libvirt's bridge driver sets the matching "dummy tap device" to
IFF_DOWN prior to DAD completing.
This patch waits for DAD completion by periodically polling the kernel
using netlink to check whether there are any IPv6 addresses assigned
to bridge which have a 'tentative' state (if there are any in this
state, then DAD hasn't yet finished). After DAD is finished, execution
continues. To avoid an endless hang in case something was wrong with
the kernel's DAD, we wait a maximum of 5 seconds.
Commit id '1c24cfe9' added error messages for virNumaSetPagePoolSize;
however, virNumaGetHugePageInfo also uses virNumaGetHugePageInfoPath
in order to build the path, but it never checked upon return if
the built path exists which could lead to an error message as follows:
$ virsh freepages 0 1
error: Failed to open file
'/sys/devices/system/node/node0/hugepages/hugepages-1kB/free_hugepages':
No such file or directory
Rather than add the same message for the other two callers, adjust
the virNumaGetHugePageInfoPath in order not only build the path, but
also check if the built path exists. If the path does not exist,
then generate the error message and return failure.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Commit id '1c24cfe9' added new checks and error messaes for failure
scenarios. Let's adjust those error messages to after the call to
virNumaGetHugePageInfoPath in order to provide a more specific error
message depending on node and page_size
After this patch:
# virsh allocpages --pagesize 2047 --pagecount 1 --cellno 0
error: operation failed: page size 2047 is not available on node 0
# virsh allocpages --pagesize 2047 --pagecount 1
error: operation failed: page size 2047 is not available
Signed-off-by: Luyao Huang <lhuang@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1265114
Refactor helper virNumaGetHugePageInfoPath to handle returning a directory
path when passed a page_size of 0 and suffix == NULL into a new helper
virNumaGetHugePageInfoDir which will only be called when a directory
path is expected to be returned. This solves the issue where the helper
was called with page_size == 0 expecting a file path in return, but
instead got a directory path and failed in virFileReadAll with:
error : virFileReadAll:1358 : Failed to read file
'/sys/devices/system/node/node0/hugepages/': Is a directory
Since virNumaGetPages API expects to return a directory by passing
page_size == 0 and suffix == NULL, it will now call the new helper.
Callers to virNumaGetHugePageInfoPath expect to return a file path
which could then be used in the call to virFileReadAll.
Signed-off-by: Luyao Huang <lhuang@redhat.com>
We have macros for both positive and negative string matching.
Therefore there is no need to use !STREQ or !STRNEQ. At the same
time as we are dropping this, new syntax-check rule is
introduced to make sure we won't introduce it again.
Signed-off-by: Ishmanpreet Kaur Khera <khera.ishman@gmail.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Event implementations need to be registered before a connection to the
Hypervisor is opened, otherwise event handling can be impaired (e.g.
delayed messages). This fact is referenced in an e-mail [1], but should
also be noted in the documentation of the registration functions.
[1] https://www.redhat.com/archives/libvirt-users/2014-April/msg00011.html
After a successful creation of a directory, if some other call results
in returning a failure, let's remove the directory we created to
prevent another round trip or confusion in the caller. In particular, this
function can be called during a storage backend buildVol, so in order
to ensure that caller doesn't need to distinguish between failed create
or some other failure after create, just remove the directory we created.
Signed-off-by: John Ferlan <jferlan@redhat.com>
After a successful creation of a file, if some other call results
in returning a failure, let's unlink the file we created to prevent
another round trip or confusion in the caller. In particular, this
function can be called during a storage backend buildVol, so in order
to ensure that caller doesn't need to distinguish between failed create
or some other failure after create, just remove the volume we created.
Signed-off-by: John Ferlan <jferlan@redhat.com>
The internal representation of a JSON array counts the items in
size_t. However, for some reason, when asking for the count it's
reported as int. Firstly, we need the function to return a signed
type as it's returning -1 on an error. But, not every system has
integer the same size as size_t. Therefore, lets return ssize_t.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
As it turns out the caller in this case expects a return < 0 for failure
and to get/use "errno" rather than using the negative of returned status.
Again different than the create path.
If someone "deleted" a file from the pool without using virsh vol-delete,
then the unlink/rmdir would return an error (-1) and set errno to ENOENT.
The caller checks errno for ENOENT when determining whether to throw an
error message indicating the failure. Without the change, the error
message is:
error: Failed to delete vol $vol
error: cannot unlink file '/$pathto/$vol': Success
This patch thus allows the fork path to follow the non-fork path
where unlink/rmdir return -1 and errno.
Unlike create options, if the file to be removed is already in the
pool, then the uid/gid will come from the pool. If it's the same as the
currently running process, then just do the unlink/rmdir directly
rather than going through the fork processing unnecessarily
Similar to commit id '35847860', it's possible to attempt to create
a 'netfs' directory in an NFS root-squash environment which will cause
the 'vol-delete' command to fail. It's also possible error paths from
the 'vol-create' would result in an error to remove a created directory
if the permissions were incorrect (and disallowed root access).
Thus rename the virFileUnlink to be virFileRemove to match the C API
functionality, adjust the code to following using rmdir or unlink
depending on the path type, and then use/call it for the VIR_STORAGE_VOL_DIR
Commit id 'f1f68ca33' added code to remove the directory paths for
auto-generated sockets, but that code could be called before the
paths were created resulting in generating error messages from
virFileDeleteTree indicating that the file doesn't exist.
Rather than "enforce" all callers to make the non-NULL and existence
checks, modify the virFileDeleteTree API to silently ignore NULL on
input and non-existent directory trees.
Commit 35847860f6 Added the virFileUnlink function, but failed to add
a version for mingw build, causing the following error:
Cannot export virFileUnlink: symbol not defined
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Coverity claims it could be possible to call virDBusTypeStackFree with
*stack == NULL and although the two API's that call it don't appear to
allow that - I suppose it's better to be safe than sorry
In virFileNBDDeviceFindUnused if virFileNBDDeviceIsBusy returns 0,
then both branches jumped to cleanup, so just use ignore_value
since the function returns NULL or some memory and the caller
handles the error.
Before libvirt sets the MAC address of the physdev (the physical
ethernet device) linked to a macvtap passthrough device, it always
saves the previous MAC address to restore when the guest is finished
(following a "leave nothing behind" policy). For a long time it
accomplished the save/restore with a combination of
ioctl(SIOCGIFHWADDR) and ioctl(SIOCSIFHWADDR), but in commit cbfe38c
(first in libvirt 1.2.15) this was changed to use netlink RTM_GETLINK
and RTM_SETLINK commands sent to the Physical Function (PF) of any
device that was detected to be a Virtual Function (VF).
We later found out that this caused problems with any devices using
the Cisco enic driver (e.g. vmfex cards) because the enic driver
hasn't implemented the function that is called to gather the
information in the IFLA_VFINFO_LIST attribute of RTM_GETLINK
(ndo_get_vf_config() for those keeping score), so we would never get
back a useful response.
In an ideal world, all drivers would implement all functions, but it
turns out that in this case we can work around this omission without
any bad side effects - since all macvtap passthrough <interface>
definitions pointing to a physdev that uses the enic driver *must*
have a <virtualport type='802.1Qbh'>, and since no other type of
ethernet devices use 802.1Qbh, libvirt can change its behavior in this
case to use the old-style. ioctl(SIOC[GS]IFHWADDR). That's what this
patch does.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1257004
These functions were made static as a part of commit cbfe38c since
they were no longer called from outside virnetdev.c. We once again
need to call them from another file, so this patch makes them once
again public.
In an NFS root-squashed environment the 'vol-delete' command will fail to
'unlink' the target volume since it was created under a different uid:gid.
This code continues the concepts introduced in virFileOpenForked and
virDirCreate[NoFork] with respect to running the unlink command under
the uid/gid of the child. Unlike the other two, don't retry on EACCES
(that's why we're here doing this now).
This will only be seen when debugging, but in order to help determine
whether a virFileOpenForceOwnerMode failed during an NFS root-squash
volume/file creation, add an error message from the child.
commit 09778e09 switched from using ioctl(SIOCBRDELBR) for bridge
device deletion to using a netlink RTM_DELLINK message, which is the
more modern way to delete a bridge (and also doesn't require the
bridge to be ~IFF_UP to succeed). However, although older kernels
(e.g. 2.6.32, in RHEL6/CentOS6) support deleting *some* link types
with RTM_NEWLINK, they don't support deleting bridges, and there is no
compile-time way to figure this out.
This patch moves the body of the SIOCBRDELBR version of
virNetDevBridgeDelete() into a static function, calls the new function
from the original, and also calls the new function from the
RTM_DELLINK version if the RTM_DELLINK message generates an EOPNOTSUPP
error. Since RTM_DELLINK is done from the subordinate function
virNetlinkDelLink, which is also called for other purposes (deleting a
macvtap interface), a function pointer called "fallback" has been
added to the arglist of virNetlinkDelLink() - if that arg != NULL, the
provided function will be called when (and only when) RTM_DELLINK
fails with EOPNOTSUPP.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1252780 (part 2)
commit fc7b23db switched from using ioctl(SIOCBRADDBR) for bridge
creation to using a netlink RTM_NEWLINK message with IFLA_INFO_KIND =
"bridge", which is the more modern way to create a bridge. However,
although older kernels (e.g. 2.6.32, in RHEL6/CentOS6) support
creating *some* link types with RTM_NEWLINK, they don't support
creating bridges, and there is no compile-time way to figure this out
(since the "type" isn't an enum, but rather a character string).
This patch moves the body of the SIOCBRADDBR version of
virNetDevBridgeCreate() into a static function, calls the new function
from the original, and also calls the new function from the
RTM_NEWLINK version if the RTM_NEWLINK message generates an EOPNOTSUPP
error.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1252780
So far, the virProcessSetNamespaces() takes an array of FDs that
it tries to set namespace on. However, in the very next commit
this array may be sparse, having some -1's in it. Teach the
function to cope with that.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The ACS checks are meaningless when using the more modern VFIO driver
for device assignment since VFIO has its own more complete and exact
checks, but I didn't realize that when I added support for VFIO. This
patch eliminates the ACS check when preparing PCI devices for
assignment if VFIO is being used.
This resolves:
https://bugzilla.redhat.com/show_bug.cgi?id=1256486
Commit 89c509a0 added getters for cgroup block device I/O throttling,
however stub versions of these functions have not matching function
prototypes that result in compilation fail on platforms not supporting
cgroup.
Fix build by correcting prototypes of the stubbed functions.
Pushing under build-breaker rule.
This function translates device paths to "major:minor " string, and all
virCgroupSetBlkioDevice* functions are modified to use it. It's a
cleanup with no functional change.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
That function takes string list and returns first string in that list
that starts with the @prefix parameter with that prefix being skipped as
the caller knows what it starts with (also for easier manipulation in
future).
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Fix inconsistency between function description and actual
parameter name in virConfGetValue/virConfSetValue.
Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com>
Ever since commit e44b0269, 64-bit mingw compilation fails with:
../../src/util/virprocess.c: In function 'virProcessGetPids':
../../src/util/virprocess.c:628:50: error: passing argument 4 of 'virStrToLong_i' from incompatible pointer type [-Werror=incompatible-pointer-types]
if (virStrToLong_i(ent->d_name, NULL, 10, &tmp_pid) < 0)
^
In file included from ../../src/util/virprocess.c:59:0:
../../src/util/virstring.h:53:5: note: expected 'int *' but argument is of type 'pid_t * {aka long long int *}'
int virStrToLong_i(char const *s,
^
cc1: all warnings being treated as errors
Although mingw won't be using this function, it does compile the
file, and the fix is relatively simple.
* src/util/virprocess.c (virProcessGetPids): Don't assume pid_t
fits in int.
Signed-off-by: Eric Blake <eblake@redhat.com>
If this function fails, the error message is reported only in
some cases (e.g. OOM), but in some it's not (e.g. duplicate key).
This fact is painful and we should either not report error at all
or report the error in all possible cases. I vote for the latter.
Unfortunately, since the key may be an arbitrary value (not
necessarily a string) we can't report it in the error message.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
In 9190f0b0 we've tried to fix an OOM. And boy, was that fix
successful. But back then, the hash table implementation worked
strictly over string keys, which is not the case anymore. Hash
table have this function keyCopy() which returns void *.
Therefore a local variable that is temporarily holding the
intermediate return value from that function should be void *
too.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
In order to share as much virsh' logic as possible with upcomming
virt-admin client we need to split virsh logic into virsh specific and
client generic features.
Since majority of virsh methods should be generic enough to be used by
other clients, it's much easier to rename virsh specific data to virshX
than doing this vice versa. It moved generic virsh commands (including info
and opts structures) to generic module vsh.c.
Besides renaming methods and structures, this patch also involves introduction
of a client specific control structure being referenced as private data in the
original control structure, introduction of a new global vsh Initializer,
which currently doesn't do much, but there is a potential for added
functionality in the future.
Lastly it introduced client hooks which are especially necessary during
client connecting phase.
This fixes the crash described here:
https://www.redhat.com/archives/libvir-list/2015-August/msg00162.html
In short, we were calling ioctl(SIOCETHTOOL) pointing to a too-short
object that was a local on the stack, resulting in the memory past the
end of the object being overwritten. This was because the struct used
by the ETHTOOL_GFEATURES command of SIOCETHTOOL ends with a 0-length
array, but we were telling ethtool that it could use 2 elements on the
array.
The fix is to allocate the necessary memory with VIR_ALLOC_VAR(),
including the extra length needed for a 2 element array at the end.
This is no functional change. It's just that later in the series we
will need to pass class_id as an integer.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
There is no guarantee that an enum start it mapped onto a value
of zero. However, we are guaranteed that enum items are
consecutive integers. Moreover, it's a pity to define an enum to
avoid using magical constants but then using them anyway.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This patch modifies virSocketAddrGetRange() to function properly when
the containing network/prefix of the address range isn't known, for
example in the case of the NAT range of a virtual network (since it is
a range of addresses on the *host*, not within the network itself). We
then take advantage of this new functionality to validate the NAT
range of a virtual network.
Extra test cases are also added to verify that virSocketAddrGetRange()
works properly in both positive and negative cases when the network
pointer is NULL.
This is the *real* fix for:
https://bugzilla.redhat.com/show_bug.cgi?id=985653
Commits 1e334a and 48e8b9 had earlier been pushed as fixes for that
bug, but I had neglected to read the report carefully, so instead of
fixing validation for the NAT range, I had fixed validation for the
DHCP range. sigh.
Qemu reports physical size 0 for block devices. As 15fa84acbb
changed the behavior of qemuDomainGetBlockInfo to just query the monitor
this created a regression since we didn't report the size correctly any
more.
This patch adds code to refresh the physical size of a block device by
opening it and seeking to the end and uses it both in
qemuDomainGetBlockInfo and also in qemuDomainGetStatsOneBlock that was
broken since it was introduced in this respect.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1250982
The commit 7e72de4 didn't consider the hotplug scenarios. The patch addresses
the hotplug case whereby if atleast one of the pci function is owned by a
guest, the hotplug of other functions/devices in the same iommu group to the
same guest goes through successfully.
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
So far qemu-nbd is run even if the nbd kernel module isn't loaded. This
leads to errors when the user starts his lxc container while libvirt
could easily load the nbd module automatically.
Commit id 'ac3ed2085' causes 'virsh nodedev-list --cap net' to fail
on any system without SYSFS_INFINIBAND_DIR (/sys/class/infiniband).
Rather than assume it's there and fail on the attempt to open the
non-existent directory, check if it's there - if not, return
success and move on. Also fix caller to check < 0 upon return.
As reported by Suren Hajyan <shajyan@redhat.com> from run of unit tests
Commit ac3ed20 breaks build on FreeBSD with:
CC util/libvirt_util_la-virnetdev.lo
util/virnetdev.c:2967:1: error: unused function 'virNetDevRDMAFeature' [-Werror,-Wunused-function]
virNetDevRDMAFeature(const char *ifname,
^
So hide virNetDevRDMAFeature function under the #ifdef 'SIOCETHTOOL'
and 'HAVE_STRUCT_IFREQ' section.
Pushed under the build breaker rule.
The scope name, even according to our docs is
"machine-$DRIVER\x2d$VMNAME.scope" virSystemdMakeScopeName would use the
resource partition name instead of "machine-" if it was specified thus
creating invalid scope paths.
This makes libvirt drop cgroups for a VM that uses custom resource
partition upon reconnecting since the detected scope name would not
match the expected name generated by virSystemdMakeScopeName.
The error is exposed by the following log entry:
debug : virCgroupValidateMachineGroup:302 : Name 'machine-qemu\x2dtestvm.scope' for controller 'cpu' does not match 'testvm', 'testvm.libvirt-qemu' or 'machine-test-qemu\x2dtestvm.scope'
for a "/machine/test" resource and "testvm" vm.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1238570
Adding functionality to libvirt that will allow
it query the interface for the availability of RDMA and
tx-udp_tnl-segmentation Offloading NIC capabilities
Here is an example of the feature XML definition:
<device>
<name>net_eth4_90_e2_ba_5e_a5_45</name>
<path>/sys/devices/pci0000:00/0000:00:03.0/0000:08:00.1/net/eth4</path>
<parent>pci_0000_08_00_1</parent>
<capability type='net'>
<interface>eth4</interface>
<address>90:e2:ba:5e:a5:45</address>
<link speed='10000' state='up'/>
<feature name='rx'/>
<feature name='tx'/>
<feature name='sg'/>
<feature name='tso'/>
<feature name='gso'/>
<feature name='gro'/>
<feature name='rxvlan'/>
<feature name='txvlan'/>
<feature name='rxhash'/>
<feature name='rdma'/>
<feature name='txudptnl'/>
<capability type='80203'/>
</capability>
</device>
virDomainMigrateFinish* APIs were unfortunately designed to return the
pointer to the domain on destination and NULL on error. This looks OK in
normal cases but the same API is also called when we know migration
failed and thus we expect Finish to return NULL even if it actually did
all it was supposed to do without any error. The call is defined to
return nonnull domain pointer over RPC, which means returning NULL will
always result in an error being send. If this was not in fact an error,
the API itself wouldn't set anything to the thread local virError, which
makes the RPC layer come up with it's own "Library function returned
error but did not set virError" error.
This is quite confusing and also hard to detect by the caller. This
patch adds a special error code which can be used to check that Finish
successfully aborted migration.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
This is a self-locking wrapper around virHashTable. Only a limited set
of APIs are implemented now (the ones which are used in the following
patch) as more can be added on demand.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Optimize the virBitmap to array-of-char bitmap conversion by skipping
trailing zero bytes.
This also fixes a regression when requesting iothread information from a
live VM since after commit 825df8c315 the
bitmap returned from virProcessGetAffinity is too big to be formatted
properly via RPC. A user would get the following error:
error: Unable to get domain IOThreads information
error: Unable to encode message payload
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1238589
Avoid a false positive since Coverity find a path in virResizeN which
could return 0 prior to the allocation of memory and thus flags a
possible NULL dereference. Instead allocate the output buffer based
on 'nparams' and only fill it partially if need be - shouldn't be too
much a waste of space. Quicker than multiple VIR_RESIZE_N calls or
two loops of STREQ's sandwiched around a single VIR_ALLOC_N using
'n' matches from a first loop to generate the 'n' addresses to return
Signed-off-by: John Ferlan <jferlan@redhat.com>
Convert virPCIDriverDir to return the buffer allocated (or not) and make the
appropriate check in the caller.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Convert virPCIDriverFile to return the buffer allocated (or not) and make the
appropriate check in the caller.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Convert virPCIFile to return the buffer allocated (or not) and make the
appropriate check in the caller.
Signed-off-by: John Ferlan <jferlan@redhat.com>
We already enable the parser option to detect invalid UTF-8, but
didn't test it. Also, JSON states that behavior of an object
with a duplicated key is undefined; we chose to reject it, but
were not testing it.
With the enhanced tests in place, we can simplify yajl2
initialization by relying on parser defaults being sane.
* src/util/virjson.c (virJSONValueFromString): Simplify.
* tests/jsontest.c (mymain): Test more bad usage.
Signed-off-by: Eric Blake <eblake@redhat.com>
Since older yajl ignores trailing garbage, a client can cause
problems by intentionally ending the wrapper array early. Since
we already track nesting, it's not too much harder to reject
invalid nesting pops.
* src/util/virjson. (_virJSONParser): Add field.
(virJSONValueFromString): Set witness.
(virJSONParserHandleEndArray): Use it to catch abuse.
* tests/jsontest.c (mymain): Test it.
Signed-off-by: Eric Blake <eblake@redhat.com>
Yajl 2 has a nice feature that it can be configured whether to
allow multiple JSON objects parsed from a single stream, defaulting
to off. And yajl 1.0.12 at least provided a way to tell if all
input bytes were parsed, or if trailing bytes remained after a
valid JSON object was parsed. But we target RHEL 6 yajl 1.0.7,
which has neither of these. So fake it by always parsing '[...]'
instead, so that trailing garbage either trips up the array parse,
or is easily detected when unwrapping the result.
* src/util/virjson.c (virJSONValueFromString): With older json,
wrap text to avoid trailing garbage.
* tests/jsontest.c (mymain): Add tests for this.
Signed-off-by: Eric Blake <eblake@redhat.com>
We have been allowing javascript style comments in JSON ever
since commit 9428f2c (v0.7.5), but qemu doesn't send them, and
they are not strict JSON. Reject them for now; if we can later
prove that it is worthwhile, we can reinstate it at that point
(or even make it conditional, by adding a bool parameter to
the libvirt entry point).
* src/util/virjson.c (virJSONValueFromString): Don't enable
comment parsing.
* tests/jsontest.c (mymain): Test it.
Signed-off-by: Eric Blake <eblake@redhat.com>
Commit ceb496e5 fails on RHEL 6, with yajl 1.0.7, because that
version of yajl returns yajl_status_insufficient_data when the
parser is waiting for the rest of a token (this enum value was
dropped in yajl 2, so we have to wrap it). It also exposes a
problem where older yajl silently ignores trailing garbage after
a successful parse, so this patch works around that by changing
the testsuite. Another more invasive patch can add tighter
semantics to json parsing, but this is sufficient for a minimal
clean backport.
While touching this, fix up our error message cleanup. Yajl
documents that error messages produced by yajl_get_error()
MUST be cleaned with yajl_free_error(); this is certainly
true if we were to pass non-NULL allocator callbacks during
yajl_alloc(), but probably harmless in our usage of passing
NULL. But better safe than sorry.
* src/util/virjson.c (virJSONValueFromString): Allow different
error code. Use canonical cleanup of error message.
(VIR_YAJL_STATUS_OK): New helper macro.
* tests/jsontest.c (mymain): Wrap text to avoid difference in
trailing garbage handling
Signed-off-by: Eric Blake <eblake@redhat.com>
The SCSI Architecture Model defines a logical unit address
as 64-bits in length, so change the field accordingly so
that the entire value could be stored.
Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
The address elements are all unsigned integers, so we should
use the appropriate print directive when printing it.
Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
While working in qemu_monitor_json, I repeatedly found myself
getting a value then checking if it was an object. Add some
wrappers to make this task easier.
* src/util/virjson.c (virJSONValueObjectGetByType)
(virJSONValueObjectGetObject, virJSONValueObjectGetArray): New
functions.
(virJSONValueObjectGetString, virJSONValueObjectGetNumberInt)
(virJSONValueObjectGetNumberUint)
(virJSONValueObjectGetNumberLong)
(virJSONValueObjectGetNumberUlong)
(virJSONValueObjectGetNumberDouble)
(virJSONValueObjectGetBoolean): Simplify.
(virJSONValueIsNull): Change return type.
* src/util/virjson.h: Reflect changes.
* src/libvirt_private.syms (virjson.h): Export them.
* tests/jsontest.c (testJSONLookup): New test.
Signed-off-by: Eric Blake <eblake@redhat.com>
I was adding a JSON test, and was shocked to find out our parser
treated the input string of "1" as invalid JSON. It turns out
that YAJL specifically documents that it buffers input, and that
if the last input read could be a prefix to a longer token, then
you have to explicitly tell the parser that the buffer has ended
before that token will be processed.
It doesn't help that yajl 2 renamed the function from what it was
in yajl 1.
* src/util/virjson.c (virJSONValueFromString): Complete parse, in
case buffer ends in possible token prefix.
* tests/jsontest.c (mymain): Expose the problem.
Signed-off-by: Eric Blake <eblake@redhat.com>
The `virTypedParamsAddStringList' function provides interface to add a
NULL-terminated array of string values as a multi-value to the params.
Signed-off-by: Pavel Boldin <pboldin@mirantis.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Add multikey API:
* virTypedParamsFilter that filters all the parameters with specified name.
* virTypedParamsGetStringList that returns a list with all the values for
specified name and string type.
Signed-off-by: Pavel Boldin <pboldin@mirantis.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Allow multi-value parameters to be build using virTypedParamsAdd*
functions by removing check for duplicates.
Signed-off-by: Pavel Boldin <pboldin@mirantis.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The `virTypedParamsValidate' function now can be instructed to allow
multiple entries for some of the keys. For this flag the type with
the `VIR_TYPED_PARAM_MULTIPLE' flag.
Add unit tests for this new behaviour.
Signed-off-by: Pavel Boldin <pboldin@mirantis.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1220527
This type of information defines attributes of a system
baseboard. With one exception: board type is yet not implemented
in qemu so it's not introduced here either.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This happens if user requires creation of a directory with specified
UID/GID permissions. To accomplish this, we use fork approach and
set particular UID/GID permissions in child process. However, child
process doesn't have a valid descriptor to a logfile (this is prohibited
explicitly) and since parent process doesn't handle negative exit codes from
child in any way, 'uknown cause' error is returned to the user.
Commit 92d9114e tweaked the way we handle child errors when using fork
approach to set specific permissions (features originally introduced
by 98f6f381). The same logic should be used to create directories with
specified permissions as well.
https://bugzilla.redhat.com/show_bug.cgi?id=1230137
Previous patch of this series proposed a fix to virDirCreate, so that parent
process reports an error if child process failed its task.
However our logic still permits the child to exit with negative errno followed
by a check of the status on the parent side using WEXITSTATUS which, being
POSIX compliant, takes the lower 8 bits of the exit code and returns is to
the caller. However, by taking 8 bits from a negative exit code
(two's complement) the status value we read and append to stream is
'2^8 - abs(original exit code)' which doesn't quite reflect the real cause when
compared to the meaning of errno values.
A variable can't be named system, obviously. Well, it can if the
compiler is new enough to distinguish a variable named system and a
function call system(). And some older systems, don't have wise
compiler.
CC util/libvirt_util_la-virsysinfo.lo
cc1: warnings being treated as errors
../../src/util/virsysinfo.c: In function 'virSysinfoParseSystem':
../../src/util/virsysinfo.c:649: error: declaration of 'system' shadows a global declaration [-Wshadow]
/usr/include/stdlib.h:717: error: shadowed declaration is here [-Wshadow]
make[3]: *** [util/libvirt_util_la-virsysinfo.lo] Error 1
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Move all the system_* fields into a separate struct. Not only this
simplifies the code a bit it also helps us to identify whether BIOS
info is present. We don't have to check all the four variables for
being not-NULL, but we can just check the pointer to the struct.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Move all the bios_* fields into a separate struct. Not only this
simplifies the code a bit it also helps us to identify whether BIOS
info is present. We don't have to check all the four variables for
being not-NULL, but we can just check the pointer to the struct.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1224587
The function takes two important arguments (among many others): @node
and @page_size. From these two a path under /sys is constructed. The
path is then used to read and write the desired size of huge pages
pool. However, if the path does not exists due to either @node or
@page_size having nonexistent value (e.g. there's no such NUMA node or
no page size like -2), an cryptic error message is produced:
virsh # allocpages --pagesize 2049 --pagecount 8 --cellno -2
error: Failed to open file '/sys/devices/system/node/node-2/hugepages/hugepages-2049kB/nr_hugepages': No such file or directory
Add two more checks to catch this and therefore produce much more
friendlier error messages.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
dnsmasq conf file contents needs to have quotes escaped for it to
work. Because of this, the network-create/start for a network with
quotes in the name fails. The patch escapes strings for the entries
that go into the conf file.
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
Commit 825df8c3 refactored virProcess{Set,Get}Affinity routines,
however broke BSD implementation because of the incorrect variable
name. Fix build by using a proper variable name.
Pushing as trivial and build break fix.
The stubs for the two functions that are compiled on platforms that
don't have HAVE_GETPWUID_R and friends defined do not return error but
report an error message. The calling code then assumes that the @uid or
@gid arguments were filled, which is not the case in the stubs.
There was a couple of problems with the style fixes applied to the original
patch:
1.) virFileReadAllQuiet comparison was incorrectly parenthesized when moved
into a condition, causing the len to be set to the result of comparison. This,
together with the removed underflow check would underflow the phy buffer.
2.) The logic was broken. Failure to call "ip" would abort the function, thus
the "iw" branch would never be reached.
This aims to fix the issues and work around possible style complains :)
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Refactor the function to return the bitmap instead of an integer and the
inner workings so that they make more sense.
This patch also fixes possible segfault on old systems that was
introduced by commit:
commit f1a43a8e41
Author: Hu Tao <hutao@cn.fujitsu.com>
Date: Fri Sep 14 15:46:59 2012 +0800
use virBitmap to store cpu affinity info
Since commit 55ace7c478, the sockettest
fails without VIR_TEST_DEBUG set. The problem is found by test number
42 (co-incidence?), which tests range '192.168.122.1' -
'192.168.122.255' in network '192.168.122.0/24'. That is supposed to
fail because the end address is equal to the broadcast address.
When comparing these two in 'virSocketAddrEqual(end, &broadcast)',
there is a check for sin_addr as well as for sin_port. That port,
however, is different when we do not enable test debugging. With the
testing enabled, the port is 0 (correctly initialized), but without that
it has a random number there. And that's because the structure is not
initialized anywhere.
By zeroing the structure before filling in the info, we make sure we
return only the address and not any information that was not requested.
And the test work once again.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Since some functions can be optimized by reusing the buffers that they
already have instead of allocating and copying new ones, lets split
virBitmapToData to two functions where one only converts the data and
the second one is a wrapper that allocates the buffer if necessary.
There are now many more reasons that virSocketAddrGetRange() could
fail, so it is much more informative to report the error there instead
of in the caller. (one of the two callers was previously assuming
success, which is almost surely safe based on the parsing that has
already happened to the config by that time, but it still is nicer to
account for an error "just in case")
Part of fix for: https://bugzilla.redhat.com/show_bug.cgi?id=985653
virSocketAddrGetRange() has been updated to take the network address
and prefix, and now checks that both the start and end of the range
are within that network, thus validating that the entire range of
addresses is in the network. For IPv4, it also checks that ranges to
not start with the "network address" of the subnet, nor end with the
broadcast address of the subnet (this check doesn't apply to IPv6,
since IPv6 doesn't have a broadcast or network address)
Negative tests have been added to the network update and socket tests
to verify that bad ranges properly generate an error.
This resolves: https://bugzilla.redhat.com/show_bug.cgi?id=985653
When we change system clock to years ago, a certain CPU may use up 100% cputime.
The reason is that in function virEventPollCalculateTimeout(), we assign the
unsigned long long result to an INT variable,
*timeout = then - now; // timeout is INT, and then/now are long long
if (*timeout < 0)
*timeout = 0;
there's a chance that variable @then minus variable @now may be a very large number
that overflows INT value expression, then *timeout will be negative and be assigned to 0.
Next the 'poll' in function virEventPollRunOnce() will get into an 'endless' while loop there.
thus, the cpu that virEventPollRunOnce() thread runs on will go up to 100%.
Although as we discussed before in https://www.redhat.com/archives/libvir-list/2015-May/msg00400.html
it should be prohibited to set-time while other applications are running, but it does
seems to have no harm to make the codes more robust.
Signed-off-by: Wang Yufei <james.wangyufei@huawei.com>
Signed-off-by: Zhang Bo <oscar.zhangbo@huawei.com>
If the <sysinfo type='smbios'...> ends up not formatting any sub-elements,
then rather than formatting as:
<sysinfo type='smbios'>
</sysinfo>
Just format it more cleanly as:
<sysinfo type='smbios'/>
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Only set directory permissions at pool build time, if:
- User explicitly requested a mode via the XML
- The directory needs to be created
- We need to do the crazy NFS root-squash workaround
This allows qemu:///session to call build on an existing directory
like /tmp.
If the firewalld backend wasn't available and libvirt decides to try
setting up a "direct" backend, it checks for the presence of iptables,
ip6tables, and ebtables. If they are not found, a message like this is logged:
error : virFirewallValidateBackend:193 : direct firewall backend
requested, but /usr/sbin/ip6tables is not available:
No such file or directory
But then at a later time if an attempt is made to use the virFirewall
API, failure will be indicated with:
error : virFirewallApply:936 : out of memory
This patch changes virFirewallApply to first check if a firewall
backend hadn't been successfully setup, and logs a slightly more
informative message in that case:
error : virFirewallApply:940 : internal error:
Failed to initialize a valid firewall backend
This resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1223876
If an SRIOV PF is offline, the kernel won't complain if you set the
mac address and vlan tag for a VF via this PF, and it will even let
you assign the VF to a guest using PCI device assignment or macvtap
passthrough. But in this case (the PF isn't online), the device won't
be usable in the guest.
Silently setting the PF online would solve the connectivity problem,
but as pointed out by Dan Berrange, when an interface is set online
with no associated config, the kernel will by default turn on IPv6
autoconf, which could create unexpected security problems for the
host. For this reason, this patch instead logs an error and fails the
operation.
This resolves: https://bugzilla.redhat.com/show_bug.cgi?id=893738
Originally filed against RHEL6, but present in every version of
libvirt until today.
Due to a kernel commit (b4b8f770e), cpuinfo format has changed on
ARMs. Firstly, 'Processor: ...' may not be reported, it's
replaced by 'model name: ...'. Secondly, the "Processor" string
may occur in CPU name, e.g. 'ARMv7 Processor rev 5 (v7l)'.
Therefore, we must firstly look for 'model name' and then for
'Processor' if not found.
Moreover, lines in the cpuinfo file are shuffled, so we better
not manipulate the pointer to start of internal buffer as we may
lost some info.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Old compilers whine:
src/util/virutil.c: In function 'virMemoryMaxValue':
src/util/virutil.c:2612: error: declaration of 'ulong' shadows a global declaration [-Wshadow]
/usr/include/sys/types.h:151: error: shadowed declaration is here [-Wshadow]
s/ulong/capped/ to work around the problem
Using joinable threads does not help anything, but it can lead to memory
leaks.
When a worker thread exits, it decreases nWorkers or nPrioWorkers and
once both nWorkers and nPrioWorkers are zero (i.e., the last worker is
gone), quit_cond is signaled. When freeing the pool we first tell all
threads to die and then we are waiting for both nWorkers and
nPrioWorkers to become zero. At this point we already know all threads
are gone. So the only reason for calling virThreadJoin of all workers is
to free the memory allocated for joinable threads. If we avoid
allocating this memory, we don't need to take care of freeing it.
Moreover, any memory associated with a worker thread which died before
we asked it to die (e.g., because virCondWait failed in the thread)
would be lost anyway since virThreadPoolFree calls virThreadJoin only
for threads which were running at the time virThreadPoolFree was called.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The APIs take the memory value in KiB and we store it in KiB
internally, but we cannot parse the whole ULONG_MAX range
on 64-bit systems, because virDomainParseScaledValue
needs to fit the value in bytes in an unsigned long long.
https://bugzilla.redhat.com/show_bug.cgi?id=1176739
Extend it to a universal helper used for clearing lists of any objects.
Note that the argument type is specifically void * to allow implicit
typecasting.
Additionally add a helper that works on non-NULL terminated arrays once
we know the length.
Currently we try to chown any directory passed to virDirCreate,
even if the user didn't request any explicit owner/group via the
pool/vol XML.
This causes issues with qemu:///session: try to build a pool of
a root owned directory like /tmp, and it fails trying to chown the
directory to the session user. Instead it should just leave things
as they are, unless the user requests changing permissions via
the pool XML.
Similarly this is annoying if creating a storage pool via system
libvirtd of an existing directory in user $HOME, it's now owned
by root.
The virDirCreate function is pretty convoluted, since it needs to
fork off in certain specific cases. Try to document that, to make
it clear where exactly we are changing behavior.
The current code attempts to handle this, but it only catches mkdir
failing with EEXIST. However if say trying to build /tmp for an
unprivileged qemu:///session, mkdir will fail with EPERM.
Rather than catch any errors, just don't attempt mkdir if the directory
already exists.
Fix for such a case:
1. Domain A and B xml contain the same SRIOV net hostdev(<interface
type='hostdev' /> with same pci address).
2. virsh start A (Successfully, and configure the SRIOV net with
custom mac)
3. virsh start B (Fail because of the hostdev used by domain A or other
reason.)
In step 3, 'virHostdevNetConfigRestore' is called for the hostdev
which is still used by domain A. It makes the mac/vlan of the SRIOV net
change.
Code Change in this fix:
1. As the pci used by other domain have been removed from
'pcidevs' in previous loop, we only restore the nic config for
the hostdev still in 'pcidevs'(used by this domain)
2. update the comments to make it more clear
Signed-off-by: Huanle Han <hanxueluo@gmail.com>
Refactor some code to create a static function virHostdevIsPCINetDevice
which will detect whether the hostdev is a pci net device or not.
Signed-off-by: Huanle Han <hanxueluo@gmail.com>
Commit 1268820a removed obsolete index() function and replaced it by
strchr. Few versions of gcc has a bug and reports a warning about
strchr:
../../src/util/virstring.c:1006: error: logical '&&' with non-zero
constant will always evaluate as true [-Wlogical-op]
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Commit 2a530a3e5 is not portable to mingw, which intentionally
avoids declaring the obsolete index(). See also:
https://bugzilla.redhat.com/show_bug.cgi?id=1214605
* src/util/virstring.c (virStringStripControlChars): Use strchr.
Signed-off-by: Eric Blake <eblake@redhat.com>
When running on FreeBSD, there's a bug in virCommandProcessIO
polling that is triggered by the commandtest.
A test that triggers EPIPE in commandtest (named "test20") hungs
forever on FreeBSD.
Apparently, this happens because FreeBSD sets POLLHUP flag on revents
when stdin in closed. And as the current implementation only checks for
POLLOUT and POLLERR, it ends up looping forever inside
virCommandProcessIO and not trying to do one more write() that would
trigger EPIPE.
To fix that check for the POLLHUP flag along with POLLOUT and POLLERR.
When a user would specify a backing chain index that is above the start
point libvirt would report a rather unhelpful error:
invalid argument: could not find backing store 1 in chain for 'sub/link2'
This patch adds an explicit check that the index is below start point in
the backing store and reports the following error if not:
invalid argument: requested backing store index 1 is above 'sub/../qcow2' in chain for 'sub/link2'
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1177062
Some storage protocols allow to have the @path field in struct
virStorageSource set to NULL. Add NULLSTR() wrappers to handle this
possibility until I finish the storage source error formatter.
Build fails on non-Linux systems with this error:
CC util/libvirt_util_la-virnetdev.lo
util/virnetdev.c:364:1: error: unused function 'virNetDevReplaceMacAddress' [-Werror,-Wunused-function]
virNetDevReplaceMacAddress(const char *linkdev,
^
util/virnetdev.c:406:1: error: unused function 'virNetDevRestoreMacAddress' [-Werror,-Wunused-function]
virNetDevRestoreMacAddress(const char *linkdev,
^
2 errors generated.
The virNetDev{Restore,Replace}MacAddress() functions are only used
by VF-related routines that are available on Linux only. So move these
functions under the same #ifdef.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1113474
When we set the MAC address of a network device as a part of setting
up macvtap "passthrough" mode (where the domain has an emulated netdev
connected to a host macvtap device that has exclusive use of the
physical device, and sets the device MAC address to match its own,
i.e. "<interface type='direct'> <source mode='passthrough' .../>"), we
use ioctl(SIOCSIFHWADDR) giving it the name of that device. This is
true even if it is an SRIOV Virtual Function (VF).
But, when we are setting the MAC address / vlan ID of a VF in
preparation for "hostdev network" passthrough (this is where we set
the MAC address and vlan id of the VF after detaching the host net
driver and before assigning the device to the domain with PCI
passthrough, i.e. "<interface type='hostdev'>", we do the setting via
a netlink RTM_SETLINK message for that VF's Physical Function (PF),
telling it the VF# we want to change. This sets an "administratively
changed MAC" flag for that VF in the PF's driver, and from that point
on (until the PF driver is reloaded, *not* merely the VF driver) that
VF's MAC address can't be changed using ioctl(SIOCSIFHWADDR) - the
only way to change it is via the PF with RTM_SETLINK.
This means that if a VF is used for hostdev passthrough, it will have
the admin flag set, and future attempts to use that VF for macvtap
passthrough will fail.
The solution to this problem is to check if the device being used for
macvtap passthrough is actually a VF; if so, we use the netlink
RTM_SETLINK message to the PF to set the VF's mac address instead of
ioctl(SIOCSIFHWADDR) directly to the VF; if not, behavior does not
change from previously.
There are three pieces to making this work:
1) virNetDevMacVLan(Create|Delete)WithVPortProfile() now call
virNetDev(Replace|Restore)NetConfig() rather than
virNetDev(Replace|Restore)MacAddress() (simply passing -1 for VF#
and vlanid).
2) virNetDev(Replace|Restore)NetConfig() check to see if the device is
a VF. If so, they find the PF's name and VF#, allowing them to call
virNetDev(Replace|Restore)VfConfig().
3) To prevent mixups when detaching a macvtap passthrough device that
had been attached while running an older version of libvirt,
virNetDevRestoreVfConfig() is potentially given the preserved name
of the VF, and if the proper statefile for a VF can't be found in
the stateDir (${stateDir}/${pfname}_vf${vfid}),
virNetDevRestoreMacAddress() is called instead (which will look in
the file named ${stateDir}/${vfname}).
This problem has existed in every version of libvirt that has both
macvtap passthrough and interface type='hostdev'. Fortunately people
seem to use one or the other though, so it hasn't caused any real
world problem reports.
This is a simple wrapper around virNetDevBandwidthManipulateFilter() that
will update the desired filter on an interface (usually a network bridge)
with a new MAC address. Although, the MAC address in question usually
refers to some other interface - the one that the filter is constructed
for. Yeah, hard to parse. Thing is, our NATed network has a bridge where
some part of QoS takes place. And vNICs from guests are plugged into
the bridge. However, if a guest decides to change the MAC of its vNIC,
the corresponding qemu process emits an event which we can use to
update the QoS configuration based on the new MAC address.. However,
our QoS hierarchy is currently not notified, therefore it falls apart.
This function (when called in response to the aforementioned event)
will update our QoS hierarchy and duct tape it together again.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Not only this simplifies the code a bit, it prepares the
environment for upcoming patches. The new
virNetDevBandwidthManipulateFilter() function is capable of both
removing a filter and adding a new one. At the same time! Yeah,
this is not currently used anywhere but look at the next commit
where you'll see it.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Currently, when constructing traffic shaping rules, the ingress
filter is created without any priority specified on the command
line. This makes kernel to make up one. While this works, it
simplifies things a bit if we provide the filter priority. In
this case, since it's the root filter lets give it the highest
priority of number 1.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The 802.11 interfaces can not be moved by themselves, their Phy has to move too.
If there are other interfaces, they have to move too -- hopefully it's not too
confusing. This is a less-invasive alternative to defining a new hostdev type
for PHYs.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
On rhel-6 is broken gcc that reports this warning:
util/virbuffer.c:500: error: logical '&&' with non-zero constant will
always evaluate as true [-Wlogical-op]
Move the pragma directive before function virBufferEscapeString because
since commit aeb5262e this function uses 'strchr' too.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
ts.tv_nsec was off by a factor of 1000, making timeouts less than a
second in the future often expiring immediately.
Signed-off-by: Michael Chapman <mike@very.puzzling.org>
The comment is describing arguments passed to the function.
However, there's no @ifmac argument. In 955af4d4 it was replaced
with @ifmac_ptr. Unfortunately, the comment wasn't updated.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Add virStringHasControlChars that checks if the string has
any control characters other than \t\r\n,
and virStringStripControlChars that removes them in-place.
Throughout the code, we have several places need to construct a path
somewhere in /sys/class/net/... They are not consistent and nearly
each code piece invents its own way how to do it. So unify this by:
1) use virNetDevSysfsFile() wherever possible
2) At least use common macro SYSFS_NET_DIR declared in virnetdev.h at
the rest of places which can't go with 1)
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
If a virAsprintf() within the function fails, we call VIR_FREE()
over @rundir variable and jump onto cleanup label, where it is
freed again. It doesn't hurt, but not make much sense too.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
When acquiring resource via sanlock fails, we would report it as
VIR_ERR_INTERNAL_ERROR, which is not very friendly to applications using
libvirt. Moreover, the lockd driver would report the same failure as
VIR_ERR_RESOURCE_BUSY, which looks better.
Unfortunately, in sanlock driver we don't really know if acquiring the
resource failed because it was already locked or there was another
reason behind. But the end result is the same and I think using
VIR_ERR_RESOURCE_BUSY reason for all acquire failures is still better
than what we have now.
https://bugzilla.redhat.com/show_bug.cgi?id=1165119
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Commit 49ed6cff is broken on mingw and other non-linux platforms:
CCLD libvirt.la
Cannot export virNetDevSysfsFile: symbol not defined
collect2: error: ld returned 1 exit status
* src/util/virnetdev.c: Provide virNetDevSysfsFile fallback.
Signed-off-by: Eric Blake <eblake@redhat.com>
Found by ./autobuild.sh during a mingw cross-compile:
Commit 8a96e87 was not innocuous - glibc happens to leak the
definition of time() through other headers, so that even without
<sys/select.h>, virrandom.c compiled just fine. But on mingw,
we were not so lucky; <sys/select.h> was important for its side
effect of dragging in <time.h>, and we now have nothing providing
the declaration of time():
../../src/util/virrandom.c: In function 'virRandomOnceInit':
../../src/util/virrandom.c:65:5: error: implicit declaration of function 'time' [-Werror=implicit-function-declaration]
unsigned int seed = time(NULL) ^ getpid();
^
../../src/util/virrandom.c:65:5: error: nested extern declaration of 'time' [-Werror=nested-externs]
Signed-off-by: Eric Blake <eblake@redhat.com>
The variable 'last_processed_hostdev_vf' indicates index of the last
successfully configed vf. When resetvfnetconfig because of failure,
hostdevs[last_processed_hostdev_vf] should also be reset.
Signed-off-by: Huanle Han <hanxueluo@gmail.com>
This patch adds checks for empty bitmaps right after the calls of
virBitmapParse. These only include spots where set API's are called and
where domain's XML is parsed.
Also, it partially reverts commit 983f5a which added a check for
invalid nodeset "0,^0" into virBitmapParse function. This change broke
the logic, as an empty bitmap should not cause an error.
https://bugzilla.redhat.com/show_bug.cgi?id=1210545
Add static virNetDevGetifaddrsAddress to attempt to get the interface
IP address. If getifaddrs is not supported, fall back to
virNetDevGetIPv4AddressIoctl to get the IP address.
This allows IPv6 addresses to be used for <listen type='network>
with device-backed networks.
https://bugzilla.redhat.com/show_bug.cgi?id=1192318
Signed-off-by: Luyao Huang <lhuang@redhat.com>
Signed-off-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Rename it to virNetDevGetIPv4AddressIoctl and make
virNetDevGetIPAddress a wrapper around it, allowing
other ways of getting the address to be implemented,
and still falling back to the old method.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Create a new common API to replace the virCgroupNew{Vcpu|Emulator|IOThread}
API's using an emum to generate the cgroup name
Signed-off-by: John Ferlan <jferlan@redhat.com>
lxc-enter-namespace stopped working on recent kernels (at least 3.19+)
due to /proc/PID/ns/* file descriptors being opened RW. From outside
the namespace these can only be opened RO.
rfc3986 states that the separator in URI path is a single slash.
Multiple slashes may potentially lead to different resources and thus we
should not remove them.
This new internal API checks if given CGroup controller is
available. It is going to be needed later when we need to make a
decision whether pin domain memory onto NUMA nodes using cpuset
CGroup controller or using numa_set_membind().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The close callbacks hash are keyed by a UUID-string, but
virCloseCallbacksRun was attempting to remove them by raw UUID. This
patch ensures the callback entries are removed by UUID-string as well.
This bug caused problems when guest migrations were abnormally aborted:
# timeout --signal KILL 1 \
virsh migrate example qemu+tls://remote/system \
--verbose --compressed --live --auto-converge \
--abort-on-error --unsafe --persistent \
--undefinesource --copy-storage-all --xml example.xml
Killed
# virsh migrate example qemu+tls://remote/system \
--verbose --compressed --live --auto-converge \
--abort-on-error --unsafe --persistent \
--undefinesource --copy-storage-all --xml example.xml
error: Requested operation is not valid: domain 'example' is not being migrated
Signed-off-by: Michael Chapman <mike@very.puzzling.org>
The nodedev-detach can report the name of the domain using the device
just the way nodedev-reattach does it.
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Dependant is flagged as wrong in US dictionary (only valid in UK
dictionary, and even then, it has only the financial sense and not the
inter-relatedness sense that we are more prone to be wanting throughout
code).
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
'virPCIDeviceList' is actually an array. Removing one element makes the
rest of the element move.
Use while loop, increase index only when not virPCIDeviceListDel(pcidevs, dev)
Signed-off-by: Huanle Han <hanxueluo@gmail.com>
In the order of appearance:
* MAX_LISTEN - never used
added by 23ad665c (qemud) and addec57 (lock daemon)
* NEXT_FREE_CLASS_ID - never used, added by 07d1b6b
* virLockError - never used, added by eb8268a4
* OPENVZ_MAX_ARG, CMDBUF_LEN, CMDOP_LEN
unused since the removal of ADD_ARG_LIT in d8b31306
* QEMU_NB_PER_CPU_STAT_PARAM - unused since 897808e
* QEMU_CMD_PROMPT, QEMU_PASSWD_PROMPT - unused since 1dc10a7
* TEST_MODEL_WORDSIZE - unused since c25c18f7
* TEMPDIR - never used, added by 714bef5
* NSIG - workaround around old headers
added by commit 60ed1d2
unused since virExec was moved by commit 02e8691
* DO_TEST_PARSE - never used, added by 9afa006
* DIFF_MSEC, GETTIMEOFDAY - unused since eee6eb6
Throughout our code, the virCgroupController enum is used in two ways.
First as an index to an array of cgroup controllers:
struct virCgroup {
char *path;
struct virCgroupController controllers[VIR_CGROUP_CONTROLLER_LAST];
};
Second way is that when calling virCgroupNew() a bitmask of the enum
items can be passed to selectively detect only some controllers. For
instance:
int
virCgroupNewVcpu(virCgroupPtr domain,
int vcpuid,
bool create,
virCgroupPtr *group)
{
...
controllers = ((1 << VIR_CGROUP_CONTROLLER_CPU) |
(1 << VIR_CGROUP_CONTROLLER_CPUACCT) |
(1 << VIR_CGROUP_CONTROLLER_CPUSET));
if (virCgroupNew(-1, name, domain, controllers, group) < 0)
goto cleanup;
}
Even though it's highly unlikely that so many new controllers will be
invented so that we would overflow when constructing the bitmask, it
doesn't hurt to check at compile time either.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
When creating new internal representation of cgroups, all passed
arguments are logged. Well, except for two: pid and pointer for
return value. Lets log them too.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The function has no argument named @name rather than @path
instead. The comment is, however, referring to @name while it
should have been referring to @path really.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Commit id '2dbfa716' exposed virCgroupDetectMountsFromFile, but did not
add the corresponding entry in the "#else /* !VIR_CGROUP_SUPPORTED */"
section of the module.
Commit id 'ba1dfc5' added virCgroupSetCpusetMemoryMigrate and
virCgroupGetCpusetMemoryMigrate, but did not add the corresponding
entry points into the "#else /* !VIR_CGROUP_SUPPORTED */" section
Commint 0473b45cc introduced new function virNetlinkDelLink, but in
it's counterpart for non-linux platform there should be ATTRIBUTE_UNUSED
instead of ATTRIBUTE_UNSUPPORTED.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Just as it is possible to delete a bridge device with the netlink
RTM_DELLINK message, one can be created with the RTM_NEWLINK
message. Because of differences in the format of the message, it's not
as straightforward as with virNetlinkDelLink() to create a single
utility function that can be used to create any type of interface, so
the new netlink version of virNetDevBridgeCreate() does its own
construction of the netlink message and calls virNetlinkCommand()
itself.
This doesn't provide any extra functionality, just provides symmetry
with the previous commit.
NB: We *could* alter the API of virNetDevBridgeCreate() to take a MAC
address, and directly program that mac address into the bridge (by
adding an IFLA_ADDRESS attribute, as is done in
virNetDevMacVLanCreate()) rather than separately creating the "dummy
tap" (e.g. virbr0-nic) to maintain a fixed mac address on the bridge,
but the commit history of virnetdevbridge.c shows that the presence of
this dummy tap is essential in some older versions of the kernel
(between 2.6.39 and 3.1 or 3.2, possibly?) to proper operation of IPv6
DAD, and I don't want to take the chance of breaking something that I
don't have the time/setup to test (my RHEL6 box is at kernel
2.6.32-544, and the next lowest kernel I have is 3.17)
https://bugzilla.redhat.com/show_bug.cgi?id=1125755
reported that a stray bridge device was left on the system when a
libvirt network failed to start due to an illegal iptables rule caused
by bad config. Apparently the reason this was happening was that
NetworkManager was noticing immediately when the bridge device was
created and automatically setting it IFF_UP. libvirt would then try to
setup the iptables rules, get an error back, and since libvirt had
never IFF_UPed the bridge, it didn't expect that it needed to set it
~IFF_UP before deleting it during the cleanup process. But the
ioctl(SIOCBRDELBR) ioctl will fail to delete a bridge if it is IFF_UP.
Since that bug was reported, NetworkManager has gotten a bit more
polite in this respect, but just in case something similar happens in
the future, this patch switches to using the netlink RTM_DELLINK
message to delete the bridge - unlike SIOCBRDELBR, it will delete the
requested bridge no matter what the setting of IFF_UP.
These two functions are identical, so no sense in having the
duplication. I resisted the temptation to replace calls to
virNetDevMacVLanDelete() with calls to virNetlinkDelLink() just in
case some mythical future platform has macvtap devices that aren't
managed with netlink (or in case we some day need to do more than just
tell the kernel to delete the device).
libvirt has always used the netlink RTM_DELLINK message to delete
macvtap/macvlan devices, but it can actually be used to delete other
types of network devices, such as bonds and bridges. This patch makes
virNetDevMacVLanDelete() available as a generic function so it can
intelligibly be called to delete these other types of interfaces.
The current auto-indentation buffer code applies indentation only on
complete strings. To allow adding a string containing newlines and
having it properly indented this patch adds virBufferAddStr.
Don't unref the old identity unless we set the new one correctly and
unref the new one on failure to set it so that we don't leak any
references or use invalid pointers.
Every thread created as a worker thread within a pool gets a name
according to virThreadPoolJobFunc name.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Automatically assign a job to every thread created by virThreadCreate.
The name of the virThreadFunc function passed to virThreadCreate is used
as the job or worker name in case no name is explicitly passed.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Each thread can use a thread local variable to keep the name of a job
which is currently running in the job.
The virThreadJobSetWorker API is supposed to be called once by any
thread which is used as a worker, i.e., it is waiting in a pool, woken
up to do a job, and returned back to the pool.
The virThreadJobSet/virThreadJobClear APIs are to be called at the
beginning/end of each job.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Wikipedia's list of common misspellings [1] has a machine-readable
version. This patch fixes those misspellings mentioned in the list
which don't have multiple right variants (as e.g. "accension", which can
be both "accession" and "ascension"), such misspellings are left
untouched. The list of changes was manually re-checked for false
positives.
[1] https://en.wikipedia.org/wiki/Wikipedia:Lists_of_common_misspellings/For_machines
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Investigation of a problem with creating passthrough macvtap devices
(https://bugzilla.redhat.com/show_bug.cgi?id=1185501) has shown that
this slightly more verbose failure message is useful. In particular,
the mac address can be used to determine the domain. You could also
figure this out by looking at preceding messages in a debug log, but
this gets it in a single place.
Use the utilities introduced in the previous patches so the qemu
driver is able to create tap devices that are bound (and unbound
on domain destroyal) to Midonet virtual ports.
Signed-off-by: Antoni Segura Puimedon <toni+libvirt@midokura.com>
Midonet is an opensource virtual networking that over lays the IP
network between hypervisors. Currently, such networks can be made
with the openvswitch virtualport type.
This patch, defines the schema and documentation that will serve
as basis for the follow up patches that will add support to libvirt
for using Midonet virtual ports for its interfaces. The schema
definition requires that the port profile expresses its interfaceid
as part of the port profile. For that reason, this is part of the
patch too.
Signed-off-by: Antoni Segura Puimedon <toni+libvirt@midokura.com>
Adds the port type definitions and methods that will be used to bind
interfaces to the Midonet virtual ports.
virtnetdevmidonet.c adds the way to bind and unbind the ports by
calling into the Midonet Host Agent control command line (installed
with the midolman package).
Signed-off-by: Antoni Segura Puimedon <toni+libvirt@midokura.com>
If the storage device type is parsed as network our parser still allows
it to omit the <source> element. The empty drive check would not trigger
on such device as it expects that every network storage source is valid.
Use VIR_STORAGE_NET_PROTOCOL_NONE as a marker that the storage source is
empty.
Valgrind complained:
==3770== Syscall param ioctl(SIOCETHTOOL) points to uninitialised byte(s)
==3770== at 0x919D407: ioctl (syscall-template.S:81)
==3770== by 0x530FE7E: rpl_ioctl (ioctl.c:42)
==3770== by 0x50CB433: virNetDevFeatureAvailable (virnetdev.c:2764)
==3770== by 0x50CB6A7: virNetDevGetFeatures (virnetdev.c:2830)
==3770== by 0x1F0E5347: udevProcessNetworkInterface (node_device_udev.c:722)
==3770== by 0x1F0E689F: udevGetDeviceDetails (node_device_udev.c:1300)
==3770== by 0x1F0E6E06: udevAddOneDevice (node_device_udev.c:1422)
==3770== by 0x1F0E6FB8: udevProcessDeviceListEntry (node_device_udev.c:1464)
==3770== by 0x1F0E70CF: udevEnumerateDevices (node_device_udev.c:1494)
==3770== by 0x1F0E7BB4: nodeStateInitialize (node_device_udev.c:1806)
==3770== by 0x51B4303: virStateInitialize (libvirt.c:777)
==3770== by 0x11DEE7: daemonRunStateInit (libvirtd.c:906)
==3770== Address 0x228e38d4 is on thread 12's stack
==3770== in frame #2, created by virNetDevFeatureAvailable (virnetdev.c:2750)
* src/util/virnetdev.c (virNetDevFeatureAvailable): Initialize all
bytes of ifr.
Signed-off-by: Eric Blake <eblake@redhat.com>
Introduced by f6a2f97e
Problem Description:
After multiple times of migrating a domain, which has an ovs interface with no portData set,
with non-shared disk, nbd ports got overflowed.
The steps to reproduce the problem:
1 define and start a domain with its network configured as:
<interface type='bridge'>
<source bridge='br0'/>
<virtualport type='openvswitch'>
</virtualport>
<model type='virtio'/>
<driver name='vhost' queues='4'/>
</interface>
2 do not set the network's portData.
3 migrate(ToURI2) it with flag 91(1011011), which means:
VIR_MIGRATE_LIVE
VIR_MIGRATE_PEER2PEER
VIR_MIGRATE_PERSIST_DEST
VIR_MIGRATE_UNDEFINE_SOURCE
VIR_MIGRATE_NON_SHARED_DISK
4 migrate success, but we got an error log in libvirtd.log:
error : virCommandWait:2423 : internal error: Child process (ovs-vsctl --timeout=5 get Interface
vnet1 external_ids:PortData) unexpected exit status 1: ovs-vsctl: no key "PortData" in Interface
record "vnet1" column external_ids
5 migrate it back, migrate it , migrate it back, .......
6 nbd port got overflowed.
The reasons for the problem is :
1 virNetDevOpenvswitchGetMigrateData() takes it as wrong if no portData is available for the ovs
interface of a domain. (We think it's not appropriate, as portData is just OPTIONAL)
2 in func qemuMigrationBakeCookie(), it fails in qemuMigrationCookieAddNetwork(), and returns with -1.
qemuMigrationCookieAddNBD() is not called thereafter, and mig->nbd is still NULL.
3 However, qemuMigrationRun() just *WARN* if qemuMigrationBakeCookie() fails, migration still successes.
cookie is NULL, it's not baked on the src side.
4 On the destination side, it would alloc a port first and then free the nbd port in COOKIE.
But the cookie is NULL due to qemuMigrationCookieAddNetwork() failure at src side. thus the nbd port
is not freed.
In this patch, we add "--if-exists" option to make ovs-vsctl not raise error if there's no portData available.
Further more, because portData may be NULL in the cookie at the dest side, check it before setting portData.
Signed-off-by: Zhou Yimin <zhouyimin@huawei.com>
Signed-off-by: Zhang Bo <oscar.zhangbo@huawei.com>
A helper that never returns an error and treats bits out of bitmap range
as false.
Use it everywhere we use ignore_value on virBitmapGetBit, or loop over
the bitmap size.
Commit c9027d8f added a detection of NIC HW features, but some of them
are not available in old kernel. Very old kernels lack enum
ethtool_flags and even if this enum is present, not all values are
available for all kernels. To be sure that we have everything in kernel
that we need, we must check for existence of most of that flags, because
only few of them were defined at first.
Also to successfully build libvirt with older kernel we need to include
<linux/types.h> before <linux/ethtool.h> to have __u32 and friends
defined.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
There was a mess in the way how we store unlimited value for memory
limits and how we handled values provided by user. Internally there
were two possible ways how to store unlimited value: as 0 value or as
VIR_DOMAIN_MEMORY_PARAM_UNLIMITED. Because we chose to store memory
limits as unsigned long long, we cannot use -1 to represent unlimited.
It's much easier for us to say that everything greater than
VIR_DOMAIN_MEMORY_PARAM_UNLIMITED means unlimited and leave 0 as valid
value despite that it makes no sense to set limit to 0.
Remove unnecessary function virCompareLimitUlong. The update of test
is to prevent the 0 to be miss-used as unlimited in future.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1146539
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
The first one is to truncate the memory limit to
VIR_DOMAIN_MEMORY_PARAM_UNLIMITED if the value is greater and the second
one is to decide whether the memory limit is set or not, unlimited means
that it's not set.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Implement virCommandPassFDGetFDIndex to determine the index a given
file descriptor will have when passed to the child process.
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Adding functionality to libvirt that will allow it
query the ethtool interface for the availability
of certain NIC HW offload features
Here is an example of the feature XML definition:
<device>
<name>net_eth4_90_e2_ba_5e_a5_45</name>
<path>/sys/devices/pci0000:00/0000:00:03.0/0000:08:00.1/net/eth4</path>
<parent>pci_0000_08_00_1</parent>
<capability type='net'>
<interface>eth4</interface>
<address>90:e2:ba:5e:a5:45</address>
<link speed='10000' state='up'/>
<feature name='rx'/>
<feature name='tx'/>
<feature name='sg'/>
<feature name='tso'/>
<feature name='gso'/>
<feature name='gro'/>
<feature name='rxvlan'/>
<feature name='txvlan'/>
<feature name='rxhash'/>
<capability type='80203'/>
</capability>
</device>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
The gluster volume name extraction code was copied from the XML parser
without changing the VIR_ERR_XML_ERROR error code. Use
VIR_ERR_CONFIG_UNSUPPORTED instead.
Similar to commit fdb80ed4f6 libvirtd
would crash if a gluster URI without path would be used in the backing
chain of a volume. The crash happens in the gluster specific part of the
parser that extracts the gluster volume name from the path.
Fix the crash by checking that the PATH is NULL.
This patch does not contain a test case as it's not possible to test it
with the current infrastructure as the test suite would attempt to
contact the gluster server in the URI. I'm working on the test suite
addition but that will be post-release material.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1196528
Previously this function relied on having ATTRIBUTE_NONNULL(1) in its
prototype rather than explicitly checking for a null
ifname. Unfortunately, ATTRIBUTE_NONNULL is just a hint to the
optimizer and code analyzers like Coverity, it doesn't actually check
anything at execution time, so the result was possible warnings from
Coverity, along with the possibility of null dereferences when ifname
wasn't available.
This patch removes the ATTRIBUTE_NONNULL from the prototype, and
checks ifname inside the function, logging an error if it's NULL (once
we've determined that the user really is trying to set a bandwidth).
libvirt was unconditionally calling virNetDevBandwidthClear() for
every interface (and network bridge) of a type that supported
bandwidth, whether it actually had anything set or not. This doesn't
hurt anything (unless ifname == NULL!), but is wasteful.
This patch makes sure that all calls to virNetDevBandwidthClear() are
qualified by checking that the interface really had some bandwidth
setup done, and checks for a null ifname inside
virNetDevBandwidthClear(), silently returning success if it is null
(as well as removing the ATTRIBUTE_NONNULL from that function's
prototype, since we can't guarantee that it is never null,
e.g. sometimes a type='ethernet' interface has no ifname as it is
provided on the fly by qemu).
This API joins the following two lines:
char *s = virBufferContentAndReset(buf1);
virBufferAdd(buf2, s, -1);
into one:
virBufferAddBuffer(buf2, buf1);
With one exception: there's no re-indentation applied to @buf1.
The idea is, that in general both can have different indentation
(like the test I'm adding proves)
Signed-off-by: Michal Privoznik <mprivozn@redhat.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>
Commit b6a2828e introduced new functions to set process scheduler. There
is a small typo in ELSE path for systems where scheduler is not
available.
Also some of the definitions were introduced later in kernel. For
example RHEL-5 is running on kernel 2.6.18, but SCHED_IDLE was introduces
in 2.6.23 [1] and SCHED_BATCH in 2.6.16 [1]. We should not count only on
existence of function sched_setscheduler(), we must also check for
existence of used macros as they might not be defined.
[1] see 'man 7 sched'
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This function uses sched_setscheduler() function so it works with
processes and threads as well (even threads not created by us, which is
what we'll need in the future).
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Rather than have a dummy waitpid loop and return of the failure status
from recvfd, adjust the logic to save the recvfd error & fd and then
in priority order:
- if waitpid failed, use that errno value
- waitpid succeeded, but if the child exited abnormally, report failure
(use EACCES to report as return failure, since either EACCES or EPERM is
what caused us to fall into the fork+setuid path)
- waitpid succeeded, but if the child reported non-zero status, report
failure (use the errno value that the child encoded into exit status)
- waitpid succeeded, but if recvfd failed, report recvfd_errno
- waitpid and recvfd succeeded, use the fd
NOTE: Original logic to retry the open and force owner mode was
"documented" as only being attempted if we had already tried opening
with the fork+setuid, but checked flags vs. VIR_FILE_OPEN_NOFORK which
is counter to how we would get to that point. So that code was removed.
It is often helpful to know which version of libvirt and QEMU
was present when a guest was first launched. Ensure this info
is written into the QEMU log file for each guest.
If a storage file would be backed with a NBD device without path
(nbd://localhost) libvirt would crash when parsing the backing path for
the disk as the URI structure's path element is NULL in such case but
the NBD parser would access it shamelessly.
Commit b38da584 introduced two new functions to get a page size but it
won't work on Windows. We should take care of this.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Commit e562a61a introduced new function to get/set interface state but
there was misuse of ATTRIBUTE_NONNULL on non-pointer attributes and also
we need to wrap that functions by #ifdef to not break mingw build.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Some code paths have special logic depending on the page size
reported by sysconf, which in turn affects the test results.
We must mock this so tests always have a consistent page size.
e562a61a07 added these two new helper functions and only used them
within virnetdev.c, but declared them in the .h file. If some
currently unsupported interface flags need to be accessed in the
future, it will make more sense to write the appropriate higher level
function rather than require us to artificially define IFF_* on some
mythical platform that doesn't have SIOC[SG]IFFLAGS (and therefore
doesn't have IFF_*) just so we can call virNetDevSetIFFFlags() to
return an error.
To help someone in not going down the wrong road, this patch makes the
two helper functions static, hopefully making it less likely that
someone will want to use them outside of virnetdev.c.
This helper eases iterating all key=value pairs stored in a JSON
object. Usually we pick only certain known keys from a JSON object, but
this will allow to walk complete objects and have the callback act on
those.
To be able to easily represent nodesets and other data stored in
virBitmaps in libvirt, this patch introduces a set of helpers that allow
to convert the bitmap to and from JSON value objects.
This patch provides the utility functions needed to synchronize
the rxfilter changes made to a guest domain with the corresponding
macvtap devices on the host:
* Get/set PROMISC flag
* Get/set ALLMULTI, MULTICAST
Signed-off-by: Tony Krowiak <akrowiak@linux.vnet.ibm.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
A gnulib change (commit id 'beae0bdc') causes ENOTCONN to be returned
from recvfd which causes us to fall into the throwaway waitpid() call
and return ENOTCONN to the caller, this then gets displayed during
a 'virsh save' when using a root squashed NFS environment that's trying
to save the file as something other than root:root.
This patch will add the additional check for ENOTCONN to force the code
into the waitpid loop looking for the actual status from the _exit()'d
child fork.
Signed-off-by: John Ferlan <jferlan@redhat.com>
When compiling without WITH_MACVTAP, we can get:
'unsupported flags (0x1) in function
virNetDevMacVLanCreateWithVPortProfile'
on an attempt to start a domain.
Remove the flag check to reach the more helpful error:
Cannot create macvlan devices on this platform
https://bugzilla.redhat.com/show_bug.cgi?id=1186928
In many cases where we invoke virSystemdTerminateMachine the
process(es) will have already gone away on their own accord.
In these cases we log an error message that the machine does
not exist. We should catch this particular error and simply
ignore it, so we don't pollute the logs.
Coverity reports that my commit af1c98e introduced
two memory leaks:
the cpumap if ncpus == 0 in virCgroupGetPercpuStats
and the params array in the test of the function.
The virDBusMethodCall method has a DBusError as one of its
parameters. If the caller wants to pass a non-NULL value
for this, it immediately makes the calling code require
DBus at build time. This has led to breakage of non-DBus
builds several times. It is desirable that only the virdbus.c
file should need WITH_DBUS conditionals, so we must ideally
remove the DBusError parameter from the method.
We can't simply raise a libvirt error, since the whole point
of this parameter is to give the callers a way to check if
the error is one they want to ignore, without having the logs
polluted with an error message. So, we add a virErrorPtr
parameter which the caller can then either ignore or raise
using the new virReportErrorObject method.
This new method is distinct from virSetError in that it
ensures the logging hooks are run.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Per-cpu stats are only shown for present CPUs in the cgroups,
but we were only parsing the largest CPU number from
/sys/devices/system/cpu/present and looking for stats even for
non-present CPUs.
This resulted in:
internal error: cpuacct parse error
Every dtrace/systemd probe also include a libvirt log message.
These are logged at level DEBUG currently, which means if you
want to see all probes they are drowned by the rest of the
DEBUG messages. Since we don't really use the INFO log level
for much, it seems reasonable to suggest we log all probes at
level INFO.
When debugging libvirt it is helpful to set probes around RPC
calls. We already have probes for libvirt's native RPC layer,
so it makes sense to add them for the DBus RPC layer too.
systemd-machined introduced a new method CreateMachineWithNetwork
that obsoletes CreateMachine. It expects to be given a list of
VETH/TAP device indexes for the host side device(s) associated
with a container/machine.
This falls back to the old CreateMachine method when the new
one is not supported.
The virsh start <domain> fails with qemu error when the hostdevices of the
same iommu group are used actively by other vms. It is not clear which
hostdev from the same iommu group is used by any of the running guests.
User has to go through every guest xml to figure out who is using the
hostdev of same iommu group.
Solution:
Iterate the iommu group of the hostdev and error our neatly in case a
device in the same iommu group is busy. Reattach code also does the same
kind of check, remove duplicate code as well.
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Basically a getter function which is implemented for accessing the
address fields in virPCIDevice.
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Found this one by inspection... The API claims to "own" the input
value even in the case of error. However, in the initial entry
to the API if the value exists, was STRING, but without a str value
it just returned without freeing the 'value' which it claims to now
own. So I added the virConfFreeValue() call in order to resolve.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Remove the resize flag and use the same code path for all callers.
This flag was added by commit 18f0316 to allow virStorageFileResize
use 'safezero' while preserving the behavior.
Explicitly return -2 when a fallback to a different method should
be done, to make the code path more obvious.
Fail immediately when ftruncate fails in the mmap method,
as we did before commit 18f0316.
Commit 4dc04d3a added virNetlinkGetErrorCode, but forgot to provide
a fallback, which kills the build on mingw (among others):
CCLD libvirt.la
Cannot export virNetlinkGetErrorCode: symbol not defined
collect2: error: ld returned 1 exit status
* src/util/virnetlink.c (virNetlinkGetErrorCode): Provide fallback.
Signed-off-by: Eric Blake <eblake@redhat.com>
Add a default implementation of virNetDevSetIPv4Address using netlink
and libnl. This avoids requiring /usr/sbin/ip or /usr/sbin/ifconfig
external binaries.
Some of the nwfilter tests are now failing since --concurrent shows
up in the ebtables command. To avoid this, implement a function
preventing the probing for lock support in the eb/iptables tools
and use it in the tests.
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
There is one problem that causes various errors in the daemon. When
domain is waiting for a job, it is unlocked while waiting on the
condition. However, if that domain is for example transient and being
removed in another API (e.g. cancelling incoming migration), it get's
unref'd. If the first call, that was waiting, fails to get the job, it
unref's the domain object, and because it was the last reference, it
causes clearing of the whole domain object. However, when finishing the
call, the domain must be unlocked, but there is no way for the API to
know whether it was cleaned or not (unless there is some ugly temporary
variable, but let's scratch that).
The root cause is that our APIs don't ref the objects they are using and
all use the implicit reference that the object has when it is in the
domain list. That reference can be removed when the API is waiting for
a job. And because each domain doesn't do its ref'ing, it results in
the ugly checking of the return value of virObjectUnref() that we have
everywhere.
This patch changes qemuDomObjFromDomain() to ref the domain (using
virDomainObjListFindByUUIDRef()) and adds qemuDomObjEndAPI() which
should be the only function in which the return value of
virObjectUnref() is checked. This makes all reference counting
deterministic and makes the code a bit clearer.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Commit 1a80b97d, which added the virCgroupHasEmptyTasks() function
forgot that the parameter @cgroup may be NULL and did not check that.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
The code assumes that def->vcpus == nvcpupids, so when we setup
fake CPU pids for old QEMU with nvcpupids == 1, we cause the
later code to read off the end of the array. This has fun results
like sche_setaffinity(0, ...) which changes libvirtd's own CPU
affinity, or even better sched_setaffinity($RANDOM, ...) which
changes the affinity of a random OS process.
On a system with 160 CPUs the /proc/cpuinfo size grows beyond
the currently set limit of 10KB causing an internal error.
This patch increases the buffer size to 1MB.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
Right now, grabbing blockinfo always calls stat on the disk, then
opens the image to determine the capacity, using a throw-away
virStorageSourcePtr. This has a couple of drawbacks:
1. We are calling stat and opening a file on every invocation of
the API. However, there are cases where the stats should NOT be
changing between successive calls (if a domain is running, no
one should be changing the physical size of a block device or raw
image behind our backs; capacity of read-only files should not
be changing; and we are the gateway to the block-resize command
to know when the capacity of read-write files should be changing).
True, we still have to use stat in some cases (a sparse raw file
changes allocation if it is read-write and the amount of holes is
changing, and a read-write qcow2 image stored in a file changes
physical size if it was not fully pre-allocated). But for
read-only images, even this should be something we can remember
from the previous time, rather than repeating every call.
2. We want to enhance the power of virDomainListGetStats, by
sharing code. But we already have a virStorageSourcePtr for
each disk, and it would be easier to reuse the common structure
than to have to worry about the one-off virDomainBlockInfoPtr.
While this patch does not optimize reuse of information in point
1, it does get us closer to being able to do so; by updating a
structure that survives between consecutive calls.
* src/util/virstoragefile.h (_virStorageSource): Add physical, to
mirror virDomainBlockInfo; rearrange fields to match public struct.
(virStorageSourceCopy): Copy the new field.
* src/qemu/qemu_driver.c (qemuDomainGetBlockInfo): Store into
storage source, then copy to block info.
Signed-off-by: Eric Blake <eblake@redhat.com>
When any of the functions modified in commit 214c687b took false branch,
the function itself used none of its parameters resulting in "unused
parameter" error. Rewriting these functions to the stubs we use
elsewhere should fix the problem.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Currently virStorageFileResize() function uses build conditionals to
choose either the posix_fallocate() or syscall(SYS_fallocate) with no
fallback in order to preallocate the space in the newly resized file.
Since the safezero code has a similar set of conditionals modify the
resize and safezero code in order to allow the resize logic to make use
of safezero to unify the look/feel of the code paths.
Add a new boolean (resize) to safezero() to make the optional decision
whether to try syscall(SYS_fallocate) if the posix_fallocate fails because
HAVE_POSIX_FALLOCATE is not defined (eg, return -1 and errno == 0).
Create a local safezero_sys_fallocate in order to handle the resize
code paths that support that. If not present, the set errno = ENOSYS
in order to allow the caller to handle the failure scenarios.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Currently build conditionals decide which of two safezero() functions
should be built - either the posix_fallocate() or mmap() with a fallback
to a slower safewrite() algorithm in order to preallocate space in a raw file.
This patch will refactor safezero to utilize static functions for either
posix_fallocate or mmap/safewrite. The build conditional still exist, but
are only for shorter sections of code.
The posix_fallocate path will make use of the ret/errno setting to contain
the logic for safezero to decide whether it needs to fallback to other
algorithms. A return of -1 with errno not changed will indicate the conditional
is not present; otherwise, a return of -1 with errno change indicates the
call was made and it failed (no functional difference to current algorithm).
The mmap/safewrite option changes only slightly to handle the ftruncate
failure for mmap. That is, previously if the ftruncate failed, there was
no fallback to the slow safewrite option.
Signed-off-by: John Ferlan <jferlan@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1160995
In our config files users are expected to pass several integer values
for different configuration knobs. However, majority of them expect a
nonnegative number and only a few of them accept a negative number too
(notably keepalive_interval in libvirtd.conf).
Therefore, a new type to config value is introduced: VIR_CONF_ULONG
that is set whenever an integer is positive or zero. With this
approach knobs accepting VIR_CONF_LONG should accept VIR_CONF_ULONG
too.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
There's no need for condition of the following form:
if (str && STREQ(str, dst))
since we have STREQ_NULLABLE macro that handles NULL cases.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
