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Currently all mockable functions are annotated with the 'noinline'
attribute. This is insufficient to guarantee that a function can
be reliably mocked with an LD_PRELOAD. The C language spec allows
the compiler to assume there is only a single implementation of
each function. It can thus do things like propagating constant
return values into the caller at compile time, or creating
multiple specialized copies of the function body each optimized
for a different caller. To prevent these optimizations we must
also set the 'noclone' and 'weak' attributes.
This fixes the test suite when libvirt.so is built with CLang
with optimization enabled.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The TODO macro expands to an fprintf() call and is used in several
places in the Xen driver. Anything that wishes to print such debug
messages should use the logging macros. In this case though, all the
places in the Xen driver should have been raising a formal libvirt
error instead. Add proper error handling and delete the TODO macro
to prevent future misuse.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The HOST_NAME_MAX, INET_ADDRSTRLEN and VIR_LOOPBACK_IPV4_ADDR
constants are only used by a handful of files, so are better
kept in virsocketaddr.h or the source file that uses them.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
We only ever test libvirt with GCC or CLang which provides a
GCC compatible compilation environment. Between them, these
compilers cover every important operating system platform,
even Windows.
Mandate their use to make it explicit that we don't care about
compilers like Microsoft VCC or other UNIX vendor C compilers.
GCC 4.4 was picked as the baseline, since RHEL-6 ships 4.4.7
and that lets us remove a large set of checks. There is a slight
issue that CLang reports itself as GCC 4.2, so we must also check
if __clang__ is defined. We could check a particular CLang version
too, but that would require someone to figure out a suitable min
version which is fun because OS-X reports totally different CLang
version numbers from CLang builds on Linux/BSD
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Back in this commit:
commit b436a8ae5c
Author: Fabian Freyer <fabian.freyer@physik.tu-berlin.de>
Date: Thu Jun 9 00:50:35 2016 +0000
gnulib: add getopt module
config-post.h was modified to define __GNUC_PREREQ, but the
original definition was never removed from internal.h, and
that is now dead code since config.h is always the first file
included.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Currently, the only type of chardev that we create the backend
for in the namespace is type='dev'. This is not enough, other
backends might have files under /dev too. For instance channels
might have a unix socket under /dev (well, bind mounted under
/dev from a different place).
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1462060
Just like in the previous commit, when attaching a file based
device which has its source living under /dev (that is not a
device rather than a regular file), calling mknod() is no help.
We need to:
1) bind mount device to some temporary location
2) enter the namespace
3) move the mount point to desired place
4) umount it in the parent namespace from the temporary location
At the same time, the check in qemuDomainNamespaceSetupDisk makes
no longer sense. Therefore remove it.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1462060
When building a qemu namespace we might be dealing with bare
regular files. Files that live under /dev. For instance
/dev/my_awesome_disk:
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source file='/dev/my_awesome_disk'/>
<target dev='vdc' bus='virtio'/>
</disk>
# qemu-img create -f qcow2 /dev/my_awesome_disk 10M
So far we were mknod()-ing them which is
obviously wrong. We need to touch the file and bind mount it to
the original:
1) touch /var/run/libvirt/qemu/fedora.dev/my_awesome_disk
2) mount --bind /dev/my_awesome_disk /var/run/libvirt/qemu/fedora.dev/my_awesome_disk
Later, when the new /dev is built and replaces original /dev the
file is going to live at expected location.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Currently, we silently assume that file we are creating in the
namespace is either a link or a device (character or block one).
This is not always the case. Therefore instead of doing something
wrong, claim about unsupported file type.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Currently, we silently assume that file we are creating in the
namespace is either a link or a device (character or block one).
This is not always the case. Therefore instead of doing something
wrong, claim about unsupported file type.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
This function is going to be used on other places, so
instead of copying code we can just call the function.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1459592
In 290a00e41d I've tried to fix the process of building a
qemu namespace when dealing with file mount points. What I
haven't realized then is that we might be dealing not with just
regular files but also special files (like sockets). Indeed, try
the following:
1) socat unix-listen:/tmp/soket stdio
2) touch /dev/socket
3) mount --bind /tmp/socket /dev/socket
4) virsh start anyDomain
Problem with my previous approach is that I wasn't creating the
temporary location (where mount points under /dev are moved) for
anything but directories and regular files.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
It comes very handy to have source path for chardevs. We already
have such function: virDomainAuditChardevPath() but it's static
and has name not suitable for exposing. Moreover, while exposing
it change its name slightly to virDomainChrSourceDefGetPath.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Sheepdog and possibly others use nested objects for network server and
thus could be specified in a way that libvirt would not parse.
Validates that https://bugzilla.redhat.com/show_bug.cgi?id=1464821
is fixed properly.
If a value of the first level object contains more objects needing
deflattening which would be wrapped in an actual object the function
would not recurse into them.
By this simple addition we can fully deflatten the objects.
As it turns out sometimes users pass in an arbitrarily nested structure
e.g. for the qemu backing chains JSON pseudo protocol. This new
implementation deflattens now a single object fully even with nested
keys.
Additionally it's not necessary now to stick with the "file." prefix for
the properties.
Currently the function would deflatten the object by dropping the 'file'
prefix from the attributes. This does not really scale well or adhere to
the documentation.
Until we refactor the worker to properly deflatten everything we at
least simulate it by adding the "file" wrapper object back.
Users may want to run the init command of a container as a special
user / group. This is achieved by adding <inituser> and <initgroup>
elements. Note that the user can either provide a name or an ID to
specify the user / group to be used.
This commit also fixes a side effect of being able to run the command
as a non-root user: the user needs rights on the tty to allow shell
job control.
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Some containers may want the application to run in a special directory.
Add <initdir> element in the domain configuration to handle this case
and use it in the lxc driver.
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
virCommand is a version of virExec that doesn't fork, however it is
just calling execve and doesn't honors setting uid/gid and pwd.
This commit extrac those pieces from virExec() to a virExecCommon()
function that is called from both virExec() and virCommandExec().
When running an application container, setting environment variables
could be important.
The newly introduced <initenv> tag in domain configuration will allow
setting environment variables to the init program.
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
All of these four functions (virStreamRecvAll, virStreamSendAll,
virStreamSparseRecvAll, virStreamSparseSendAll) take one or more
callback functions that handle various aspects of streams.
However, if any of them fails no error is reported therefore
caller does not know what went wrong.
At the same time, we silently presumed callbacks to set errno on
failure. With this change we should document it explicitly as the
error is not properly reported.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
If one these four functions fail (virStreamRecvAll,
virStreamSendAll, virStreamSparseRecvAll, virStreamSparseSendAll)
the stream is aborted by calling virStreamAbort(). This is a
public API; therefore, the first thing it does is error reset. At
that point any error that caused us to abort stream in the first
place is gone.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Our documentation to the virStreamRecvAll, virStreamSendAll,
virStreamSparseRecvAll, and virStreamSparseSendAll functions
indicates that if these functions fail, then virStreamAbort is
called. But that is not necessarily true. For instance all of
these functions allocate a buffer to work with. If the allocation
fails, no virStreamAbort() is called despite -1 being returned.
It's the same story with argument sanity checks and a lot of
other checks.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Problem with our error reporting is that the error object is a
thread local variable. That means if there's an error reported
within the I/O thread it gets logged and everything, but later
when the event loop aborts the stream it doesn't see the original
error. So we are left with some generic error. We can do better
if we copy the error message between the threads.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
When the I/O thread quits (e.g. due to an I/O error, lseek()
error, whatever), any subsequent virFDStream API should return
error too. Moreover, when invoking stream event callback, we must
set the VIR_STREAM_EVENT_ERROR flag so that the callback knows
something bad happened.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
This is only used in qemu_command.c, so move it, and clarify that
it's really about identifying if the serial config is a platform
device or not.
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Some qemu arch/machine types have built in platform devices that
are always implicitly available. For platform serial devices, the
current code assumes that only old style -serial config can be
used for these devices.
Apparently though since -chardev was introduced, we can use -chardev
in these cases, like this:
-chardev pty,id=foo
-serial chardev:foo
Since -chardev enables all sorts of modern features, use this method
for platform devices.
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Every qemu version we support has QEMU_CAPS_CHARDEV, so stop
explicitly tracking it and blacklist it like we've done for many
other feature flags.
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Several tests are intending to test some serial/console related
bits but aren't setting QEMU_CAPS_CHARDEV. This will soon be enabled
unconditionally so let's add it ahead of time.
* q35-virt-manager-basic: Intended to test a virt-manager q35 config,
which will include a serial/console device
* console-compat*: console/serial XML compat handling
* bios: Needs a serial device for sgabios CLI
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
These tests are exercising old style -serial command lines. That
code will soon be removed, so drop these tests.
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Several cases have incidental <serial> or <console> XML which aren't
the features being tested for. Upcoming changes will cause some
churn here, so instead drop these bits now.
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
AFAIK there aren't any cases where we will/should hit the old code
path for our supported qemu versions, so drop the old code.
Massive test suite churn follows
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
AFAIK there aren't any cases where we should fail these checks with
supported qemu versions, so just drop them.
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
AFAIK there aren't any qemu arch/machine types with platform parallel
devices that would require old style -parallel config, so we shouldn't
ever need this nowadays.
Remove a now redundant test
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
This demonstrates that the previous qemu caps changes will use
-chardev for pci-serial on aarch64 machvirt
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Rather than try to whitelist all device configs that can't use
-chardev, blacklist the only one that really can't, which is the
default serial/console target type=isa case.
ISA specifically isn't a valid config for arm/aarch64, but we've
always implicitly treated it to mean 'default platform device'.
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
While looking to implement a migrate-getmaxdowntime command (coming),
I noticed that the setmaxdowntime is incorrectly looking at its
parameter as a signed longlong. Not sure how that got past gcc, but
here's a simple patch to make the command line parsing and the parameter to
the worker functions all have the correct (unsigned) type.
Signed-off-by: Scott Garfinkle <seg@us.ibm.com>
This removes the classical XSS vulnerability of using unquoted
PHP_SELF.
Reported-by: John Lightsey <john@nixnuts.net>
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
vcpu properties gathered from query-hotpluggable cpus need to be passed
back to qemu. As qemu did not use the node-id property until now and
libvirt forgot to pass it back properly (it was parsed but not passed
around) we did not honor this.
This patch adds node-id to the structures where it was missing and
passes it around as necessary.
The test data was generated with a VM with following config:
<numa>
<cell id='0' cpus='0,2,4,6' memory='512000' unit='KiB'/>
<cell id='1' cpus='1,3,5,7' memory='512000' unit='KiB'/>
</numa>
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1452053
