Neither the sasl_client_init or sasl_server_init methods are even
remotely threadsafe. They do a bunch of one-time initialization and
merely use a simple integer counter to avoid repeated work, not even
using atomic increment/reads on the counter. This can easily race in a
threaded program. Protect the calls using a virOnce initializer function
which is guaranteed threadsafe at least from libvirt's POV.
If the application using libvirt also uses another library that makes
use of SASL then the race still exists. It is impossible to fix that
fully except in SASL code itself.
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Commit 44b8df4cb4 introduced a check for yajl.pc that is
extremely similar to the one we already had in place for
readline.pc - so similar, in fact, that it's still looking
for readline.pc instead of yajl.pc :)
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Similar to commit a487890d for qemu, a little bit of refactoring in
the snapshot delete code will make it easier to reuse functionality
for checkpoints.
Signed-off-by: Eric Blake <eblake@redhat.com>
Acked-by: Peter Krempa <pkrempa@redhat.com>
Fix a filename and add a couple missing words.
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Message-Id: <20190705192829.1223-1-jjongsma@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
The 'tty' variable is only used on Win32. Instead of just annotating it
with ATTRIBUTE_UNUSED, make its declaration conditional on WIN32 so that
it is clear why it is not used.
Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Simplify the clean code paths for doRemoteOpen by using VIR_AUTOFREE
Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The doRemoteOpen method was a little unusual in declaring a bunch of
local variables in the middle of the function. Move them to the top as
it is normal libvirt style.
Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The qemusecuritytest is failing on FreeBSD 11/12, reporting that files
are not correctly restored. Debugging code printfs show that the
virFileGetXAttrQuiet mock is returning 0, but the virFileGetXAttr
function is seeing -1 as the return value.
Essentially there appears to be some kind of optimization between the
real virFileGetXAttrQuiet and the real virFileGetXAttr, which breaks
when we mock virFileGetXAttrQuiet. Rather than trying to figure out
how to avoid this, it is simpler to just mock virFileGetXAttr too
since it is very short code.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
There is an error path that jumps over the initialization of
nerrors, and the jump target reads the variable contents.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Zero out the user provided memory in order to avoid potentially freeing
uninitialized memory.
Signed-off-by: Ilias Stamatis <stamatis.iliass@gmail.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Mention libssh as possible transport in the error message of an
unrecognized transport.
https://bugzilla.redhat.com/show_bug.cgi?id=1727013
Signed-off-by: Pino Toscano <ptoscano@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The LIBVIRTD_CONFIGURATION_FILE constant was introduced in
commit b7c42619e6
Author: Richard W.M. Jones <rjones@redhat.com>
Date: Mon Jun 11 11:43:41 2007 +0000
Mon Jun 11 12:41:00 BST 2007 Richard W.M. Jones <rjones@redhat.com>
and then never used !
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The LIBVIRTD_CONFIG and LIBVIRTD_NOFILES_LIMIT parameters were only
honoured when using the sysvinit scripts. This was removed already in
commit 912fe2df9d
Author: Andrea Bolognani <abologna@redhat.com>
Date: Fri Mar 15 16:47:27 2019 +0100
Drop support for "Red Hat" init scripts
so the parameters can safely be dropped.
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The sysvinit script was previously removed in
commit 912fe2df9d
Author: Andrea Bolognani <abologna@redhat.com>
Date: Fri Mar 15 16:47:27 2019 +0100
Drop support for "Red Hat" init scripts
A make rule was accidentally left behind.
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
There are probably more situations where they could be taken
advantage of, but these are very obvious scenarios because we
either manage to get rid of a bunch of explicit capabilities,
or we make a bunch of related test cases all use the macros
by switching the only odd one out.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Right now we have macros such as DO_TEST_CAPS_LATEST_PARSE_ERROR()
and DO_TEST_CAPS_ARCH_VER(), but there is no concise way to say
"using this version of QEMU on this architecture will result in a
failure".
This commit adds
DO_TEST_CAPS_ARCH_LATEST_FAILURE()
DO_TEST_CAPS_ARCH_VER_FAILURE()
DO_TEST_CAPS_ARCH_LATEST_PARSE_ERROR()
DO_TEST_CAPS_ARCH_VER_PARSE_ERROR()
and reworks
DO_TEST_CAPS_LATEST_FAILURE()
DO_TEST_CAPS_LATEST_PARSE_ERROR()
to use the corresponding DO_CAPS_TEST_ARCH_*() macros instead of
using DO_TEST_CAPS_ARCH_LATEST_FULL() directly.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
It mirrors the existing DO_TEST_CAPS_ARCH_LATEST_FULL(), and is
now used to implement DO_TEST_CAPS_ARCH_VER().
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Make sure the order is consistent between xml2argv and xml2xml,
and make room for more macros that are going to be introduced
shortly.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Currently the flags argument is completely ignored, but it should be
checked for any unsupported flags that might have been passed.
Signed-off-by: Ilias Stamatis <stamatis.iliass@gmail.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Always return / and /boot as the mount points imitating the default
Fedora installation. Use the first disk found, otherwise if no disk
device of type VIR_DOMAIN_DISK_DEVICE_DISK is present, return 0 mount
points.
Reviewed-by: Erik Skultety <eskultet@redhat.com>
Signed-off-by: Ilias Stamatis <stamatis.iliass@gmail.com>
Calling virDomainObjUpdateModificationImpact directly inside the
function body is redundant, since the same function call is embedded
into virDomainObjGetOneDef.
Signed-off-by: Ilias Stamatis <stamatis.iliass@gmail.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
There are some paths (e.g. /dev/vfio/vfio or /dev/mapper/control)
which are defined in qemu_domain.c and then in qemu_cgroup.c
again. This is suboptimal. Let's move paths into qemu_domain.h and
drop duplicate definitions.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
In my review of 89320788ac I've simplified assigning disk errors
too much as the code I've changed it to will set
VIR_DOMAIN_DISK_ERROR_NONE. This is in contradiction with our
documentation which specifies that disks with no errors are not
reported.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
If something goes wrong in testDomainGetDiskErrors() then we try
to free any strings that were previously allocated in return
array. Problem is, in my review of original patch (89320788ac)
I've mistakenly did some changes which result in possible NULL
dereference (@vm is set to NULL as the first thing under cleanup
label).
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
This reverts commit fc3990c7e6.
Now that all the reported bugs are fixed let's turn the feature
back on.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
A simple helper function that would be used from DAC and SELinux
drivers.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The purpose of this API is to allow caller move XATTRs (or remove
them) from one file to another. This will be needed when moving
top level of disk chain (either by introducing new HEAD or
removing it).
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This effectively reverts d7420430ce and adds new code.
Here is the problem: Imagine a file X that is to be shared
between two domains as a disk. Let the first domain (vm1) have
seclabel remembering turned on and the other (vm2) has it turned
off. Assume that both domains will run under the same user, but
the original owner of X is different (i.e. trying to access X
without relabelling leads to EPERM).
Let's start vm1 first. This will cause X to be relabelled and to
gain new attributes:
trusted.libvirt.security.ref_dac="1"
trusted.libvirt.security.dac="$originalOwner"
When vm2 is started, X will again be relabelled, but since the
new label is the same as X already has (because of vm1) nothing
changes and vm1 and vm2 can access X just fine. Note that no
XATTR is changed (especially the refcounter keeps its value of 1)
because the vm2 domain has the feature turned off.
Now, vm1 is shut off and vm2 continues running. In seclabel
restore process we would get to X and since its refcounter is 1
we would restore the $originalOwner on it. But this is unsafe to
do because vm2 is still using X (remember the assumption that
$originalOwner and vm2's seclabel are distinct?).
The problem is that refcounter stored in XATTRs doesn't reflect
the actual times a resource is in use. Since I don't see any easy
way around it let's just not store original owner on shared
resources. Shared resource in world of domain disks is:
- whole backing chain but the top layer,
- read only disk (we don't require CDROM to be explicitly
marked as shareable),
- disk marked as shareable.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Some paths will not be restored. Because we can't possibly know
if they are still in use or not. Reflect this in the test so that
we can test more domains. Also see next commit for more detailed
explanation.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Just like previous commit allowed to enable or disable owner
remembering for each individual path, do the same for SELinux
driver. This is going to be needed in the next commit.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
One caller in particular (virSecurityDACSetImageLabelInternal)
will want to have the feature turned on only in some cases.
Introduce @remember member to _virSecurityDACChownItem to track
whether caller wants to do owner remembering or not.
The actual remembering is then enabled if both caller wanted it
and the feature is turned on in the config file.
Technically, we could skip over paths that don't have remember
enabled when creating a list of paths to lock. We won't touch
their XATTRs after all. Well, I rather play it safe and keep them
on the locking list for now.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Both DAC and SELinux drivers support transactions. Each item on
the transaction list consists of various variables and @restore
is one of them. Document it so that as the list of variables grow
it's easier to spot which variable does what.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
The way that virSecurityDACRecallLabel is currently written is
that if XATTRs are not supported for given path to the caller
this is not different than if the path is still in use. The value
of 1 is returned which makes secdrivers skip label restore.
This is clearly a bug as we are not restoring labels on say NFS
even though previously we were.
Strictly speaking, changes to virSecurityDACRememberLabel are not
needed, but they are done anyway so that getter and setter behave
in the same fashion.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
It's better to have the function report errors, because none of
the callers does.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
It's better to have the function report errors, because none of
the callers does.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
